Nothing
R/partial.rfsrc.R
In RFpredInterval: Prediction Intervals with Random Forests and Boosted Forests
Defines functions
partial.rfsrc
partial.rfsrc <- function(
object,
oob = TRUE,
m.target = NULL,
partial.type = NULL,
partial.xvar = NULL,
partial.values = NULL,
partial.xvar2 = NULL,
partial.values2 = NULL,
partial.time = NULL,
get.tree = NULL,
seed = NULL,
do.trace = FALSE,
...)
{
## hidden options
user.option <- list(...)
terminal.qualts <- is.hidden.terminal.qualts(user.option)
terminal.quants <- is.hidden.terminal.quants(user.option)
## Object consistency
## (TBD, TBD, TBD) Version checking is NOT implemented in this mode (TBD, TBD, TBD)
if (missing(object)) {
stop("object is missing!")
}
## coherence checks
if (sum(inherits(object, c("rfsrc", "grow"), TRUE) == c(1, 2)) != 2 &
sum(inherits(object, c("rfsrc", "forest"), TRUE) == c(1, 2)) != 2) {
stop("this function only works for objects of class `(rfsrc, grow)' or '(rfsrc, forest)'")
}
## anonymous not allowed
if (inherits(object, "anonymous")) {
stop("this function does work with anonymous forests")
}
## acquire the forest --> hereafter the object is the forest
if (sum(inherits(object, c("rfsrc", "grow"), TRUE) == c(1, 2)) == 2) {
if (is.forest.missing(object)) {
stop("The forest is empty. Re-run rfsrc (grow call) with forest=TRUE")
}
object <- object$forest
}
else {
## object is already a forest.
}
## convert oob to ensemble
if (oob) {
ensemble <- "oob"
}
else {
ensemble <- "inbag"
}
## multivariate family details
family <- object$family
splitrule <- object$splitrule
## pull the x-variable and y-outcome names from the grow object
xvar.names <- object$xvar.names
yvar.names <- object$yvar.names
## verify the x-var
if (length(which(xvar.names == partial.xvar)) != 1) {
stop("x-variable specified incorrectly: ", partial.xvar)
}
## verify the x-var2
if (!is.null(partial.xvar2)) {
if (length(partial.xvar2) != length(partial.values2)) {
stop("second order x-variable and value vectors not of same length: ", length(partial.xvar2), "vs", length(partial.values2))
}
for (i in 1:length(partial.xvar2)) {
if (length(which(xvar.names == partial.xvar2[i])) != 1) {
stop("second order x-variable element", i, "specified incorrectly: ", partial.xvar2[i])
}
}
}
## Caution: There are no checks on partial.type. Note that "rel.freq" and "mort"
## are equivalent from a native code perspective.
## Determine the immutable yvar factor map which is needed for
## classification sexp dimensioning. But, first convert object$yvar
## to a data frame which is required for factor processing
#object$yvar <- as.data.frame(object$yvar)
#colnames(object$yvar) <- yvar.names
yfactor <- object$yvar.factor
## multivariate family details
m.target.idx <- get.outcome.target(family, yvar.names, m.target)
## short cut to get the y-outcome type and number of levels
yvar.types <- yfactor$types
yvar.nlevels <- yfactor$nlevels
yvar.numeric.levels <- yfactor$numeric.levels
## recover the individual subject identifiers, if they exist.
subj <- object$subj
## Get event information for survival families.
event.info <- object$event.info
event.type <- event.info$event.type
## CR.bits assignment.
cr.bits <- get.cr.bits(family)
## Determine the immutable xvar factor map.
xfactor <- object$xvar.factor
## short cut to get the x-variable type and number of levels
xvar.types <- xfactor$types
xvar.nlevels <- xfactor$nlevels
xvar.numeric.levels <- xfactor$numeric.levels
## Initialize the number of trees in the forest.
ntree <- object$ntree
## Use the training data na.action protocol.
na.action = object$na.action
## Data conversion for training data.
xvar <- as.matrix(data.matrix(object$xvar))
yvar <- as.matrix(data.matrix(object$yvar))
## Set the y dimension.
r.dim <- ncol(cbind(yvar))
## remove row and column names for proper processing by the native code
## set the dimensions.
rownames(xvar) <- colnames(xvar) <- NULL
n.xvar <- ncol(xvar)
n <- nrow(xvar)
sampsize <- round(object$sampsize(n))
## Recover the case weights and bootstrap sample.
case.wt <- object$case.wt
samp <- object$samp
## There is no test data.
outcome = "train"
## Process the get.tree vector that specifies which trees we want
get.tree <- get.tree.index(get.tree, ntree)
## Initialize the low bits.
ensemble.bits <- get.ensemble(ensemble)
bootstrap.bits <- get.bootstrap(object$bootstrap)
na.action.bits <- get.na.action(na.action)
## Initalize the high bits
samptype.bits <- get.samptype(object$samptype)
partial.bits <- get.partial(length(partial.values))
terminal.qualts.bits <- get.terminal.qualts(terminal.qualts, object$terminal.qualts)
terminal.quants.bits <- get.terminal.quants(terminal.quants, object$terminal.quants)
seed <- get.seed(seed)
do.trace <- get.trace(do.trace)
## Check that hdim is initialized. If not, set it zero.
## This is necessary for backwards compatibility with 2.3.0
if (is.null(object$hdim)) {
hdim <- 0
}
else {
hdim <- object$hdim
}
## Marker for start of native forest topology. This can change with the outputs requested.
## For the arithmetic related to the pivot point, you need to refer to stackOutput.c and in
## particular, stackForestOutputObjects().
## added from generic.predict.rfsrc.R per UBK instruction 11/04/2019
if (hdim == 0) {
offset = 0
chunk = 0
} else {
## Offset starts at parmID2. We adjust for the presence of interactions.
offset = 7
## A chunk is parmID2, contPT2, contPTR2, mwcpSZ2.
chunk = 4
if (!is.null(object$base.learner)) {
if (object$base.learner$interact.depth > 1) {
## Offset with interactions is adjusted.
## Adjusted for AUGM_X1, AUGM_X2.
offset = 9
## A chunk is parmID2, contPT2, contPTR2, mwcpSZ2, augmXone2, augmXtwo2.
chunk = 6
}
}
}
pivot <- which(names(object$nativeArray) == "treeID")
nativeOutput <- tryCatch({.Call("rfsrcPredict",
as.integer(do.trace),
as.integer(seed),
as.integer(
ensemble.bits +
bootstrap.bits +
cr.bits),
as.integer(
samptype.bits +
na.action.bits +
terminal.qualts.bits +
terminal.quants.bits +
partial.bits),
## >>>> start of maxi forest object >>>>
as.integer(ntree),
as.integer(n),
list(as.integer(length(yvar.types)),
if (is.null(yvar.types)) NULL else as.character(yvar.types),
if (is.null(yvar.types)) NULL else as.integer(yvar.nlevels),
if (is.null(yvar.numeric.levels)) NULL else sapply(1:length(yvar.numeric.levels), function(nn) {as.integer(length(yvar.numeric.levels[[nn]]))}),
if (is.null(subj)) NULL else as.integer(subj),
if (is.null(event.type)) NULL else as.integer(length(event.type)),
if (is.null(event.type)) NULL else as.integer(event.type),
if (is.null(yvar.types)) NULL else as.double(as.vector(yvar))),
if (is.null(yvar.numeric.levels)) {
NULL
}
else {
lapply(1:length(yvar.numeric.levels),
function(nn) {as.integer(yvar.numeric.levels[[nn]])})
},
list(as.integer(n.xvar),
as.character(xvar.types),
if (is.null(xvar.types)) NULL else as.integer(xvar.nlevels),
if (is.null(xvar.numeric.levels)) NULL else sapply(1:length(xvar.numeric.levels), function(nn) {as.integer(length(xvar.numeric.levels[[nn]]))}),
as.double(as.vector(xvar))),
if (is.null(xvar.numeric.levels)) {
NULL
}
else {
lapply(1:length(xvar.numeric.levels),
function(nn) {as.integer(xvar.numeric.levels[[nn]])})
},
list(as.integer(length(case.wt)),
if (is.null(case.wt)) NULL else as.double(case.wt),
as.integer(sampsize),
if (is.null(samp)) NULL else as.integer(samp)),
list(if(is.null(event.info$time.interest)) as.integer(0) else as.integer(length(event.info$time.interest)),
if(is.null(event.info$time.interest)) NULL else as.double(event.info$time.interest)),
as.integer(object$totalNodeCount),
as.integer(object$seed),
as.integer(hdim),
## Object containing base learner settings, this is never NULL.
object$base.learner,
as.integer((object$nativeArray)$treeID),
as.integer((object$nativeArray)$nodeID),
## This is hc_zero. It is never NULL.
list(as.integer((object$nativeArray)$parmID),
as.double((object$nativeArray)$contPT),
as.integer((object$nativeArray)$mwcpSZ),
as.integer((object$nativeFactorArray)$mwcpPT)),
## This slot is hc_one_augm_intr. This slot can be NULL.
if (!is.null(object$base.learner)) {
if (object$base.learner$interact.depth > 1) {
list(as.integer((object$nativeArray)$pairCT),
as.integer((object$nativeArray)$augmXone),
as.integer((object$nativeArray)$augmXtwo))
} else { NULL }
} else { NULL },
## This slot is hc_one_augm_syth. This slot can be NULL.
if (!is.null(object$base.learner)) {
if (object$base.learner$synthetic.depth > 1) {
list(as.integer((object$nativeArray)$sythSZ),
as.integer((object$nativeArray)$augmXS))
} else { NULL }
} else { NULL },
## This slot is hc_one. This slot can be NULL.
if (hdim > 0) {
list(as.integer((object$nativeArray)$hcDim),
as.double((object$nativeArray)$contPTR))
} else { NULL },
## See the offset documentation in
## rfsrc.R after the nativeArray
## SEXP objects are populated in the
## post-forest parsing for an
## explanation of the offsets below.
## These offset are DIFFERENT than the offsets used to
##
if (hdim > 1) {
## parmIDx
lapply(0:(hdim-2), function(x) {as.integer(object$nativeArray[, offset + 1 + (chunk * x)])})
} else { NULL },
if (hdim > 1) {
## contPTx
lapply(0:(hdim-2), function(x) {as.double(object$nativeArray[ , offset + 2 + (chunk * x)])})
} else { NULL },
if (hdim > 1) {
## contPTRx
lapply(0:(hdim-2), function(x) {as.double(object$nativeArray[ , offset + 3 + (chunk * x)])})
} else { NULL },
if (hdim > 1) {
## mwcpSZx
lapply(0:(hdim-2), function(x) {as.integer(object$nativeArray[, offset + 4 + (chunk * x)])})
} else { NULL },
if (hdim > 1) {
## mwcpPTx
lapply(0:(hdim-2), function(x) {as.integer(object$nativeFactorArray[[x + 1]])})
} else { NULL },
if (hdim > 1) {
if (!is.null(object$base.learner)) {
if (object$base.learner$interact.depth > 1) {
## augmXonex
lapply(0:(hdim-2), function(x) {as.integer(object$nativeArray[ , offset + 5 + (chunk * x)])})
} else { NULL }
} else { NULL }
} else { NULL },
if (hdim > 1) {
if (!is.null(object$base.learner)) {
if (object$base.learner$interact.depth > 1) {
## augmXtwox
lapply(0:(hdim-2), function(x) {as.integer(object$nativeArray[ , offset + 6 + (chunk * x)])})
} else { NULL }
} else { NULL }
} else { NULL },
if (hdim > 1) {
if (!is.null(object$base.learner)) {
if (object$base.learner$synthetic.depth > 1) {
## augmXSx
lapply(0:(hdim-2), function(x) {as.integer(object$nativeArray[ , offset + (if(object$base.learner$interact.depth > 1) 7 else 5) + (chunk * x)])})
} else { NULL }
} else { NULL }
} else { NULL },
## This slot is the synthetic topology!
if (hdim > 0) {
if (!is.null(object$base.learner)) {
if (object$base.learner$synthetic.depth > 1) {
if (!is.null(object$nativeArraySyth)) {
list(as.integer(object$nodeCountSyth),
as.integer((object$nativeArraySyth)$treeID),
as.integer((object$nativeArraySyth)$nodeID),
as.integer((object$nativeArraySyth)$hcDim),
as.integer((object$nativeArraySyth)$parmID),
as.double((object$nativeArraySyth)$contPT),
as.double((object$nativeArraySyth)$contPTR),
as.integer((object$nativeArraySyth)$mwcpSZ),
as.integer((object$nativeFactorArray)$mwcpPT))
} else { NULL }
} else { NULL }
} else { NULL }
} else { NULL },
as.integer(object$nativeArrayTNDS$tnRMBR),
as.integer(object$nativeArrayTNDS$tnAMBR),
as.integer(object$nativeArrayTNDS$tnRCNT),
as.integer(object$nativeArrayTNDS$tnACNT),
as.double((object$nativeArrayTNDS$tnSURV)),
as.double((object$nativeArrayTNDS$tnMORT)),
as.double((object$nativeArrayTNDS$tnNLSN)),
as.double((object$nativeArrayTNDS$tnCSHZ)),
as.double((object$nativeArrayTNDS$tnCIFN)),
as.double((object$nativeArrayTNDS$tnREGR)),
as.integer((object$nativeArrayTNDS$tnCLAS)),
## <<<< end of maxi forest object <<<<
list(if (is.null(m.target.idx)) as.integer(0) else as.integer(length(m.target.idx)),
if (is.null(m.target.idx)) NULL else as.integer(m.target.idx)),
as.integer(0), ## Pruning disabled
NULL,
list(as.integer(0), NULL), ## Importance disabled.
## Partial variables enabled. Note the as.integer is needed.
list(as.integer(get.type(family, partial.type)),
as.integer(which(xvar.names == partial.xvar)),
as.integer(length(partial.values)),
as.double(partial.values),
as.integer(length(partial.xvar2)),
if (length(partial.xvar2) == 0) NULL else as.integer(match(partial.xvar2, xvar.names)),
as.double(partial.values2)),
as.integer(0), ## New data disabled.
as.integer(0), ## New data disabled.
as.double(NULL), ## New data disabled.
as.double(NULL), ## New data disabled.
as.integer(ntree), ## block.size is hard-coded.
list(as.integer(0),
NULL,
as.double(0)), ## Quantiles disabled.
as.integer(get.tree),
as.integer(get.rf.cores()))}, error = function(e) {
print(e)
NULL})
## check for error return condition in the native code
if (is.null(nativeOutput)) {
stop("An error has occurred in prediction. Please turn trace on for further analysis.")
}
rfsrcOutput <- list(call = match.call(),
family = family,
partial.time = partial.time)
## Subset the user time vector from the grow time interest vector.
if (grepl("surv", family)) {
## Get the indices of the closest points of the grow time interest vector.
## Exact:
## partial.time.idx <- match(partial.time, event.info$time.interest)
## Closest:
partial.time.idx <- sapply(partial.time, function(x) {max(which(event.info$time.interest <= x))})
if (sum(is.na(partial.time.idx)) > 0) {
stop("partial.time must be a subset of the time interest vector contained in the model")
}
}
if (family == "surv") {
if ((partial.type == "rel.freq") || (partial.type == "mort")) {
mort.names <- list(NULL, NULL)
## Incoming from the native code:
## type = mort
## -> of dim [length(partial.values)] x [1] x [1] x [n]
## Outgoing to the R code:
## -> of dim [n] x [length(partial.values)]
survOutput <- (if (!is.null(nativeOutput$partialSurv))
array(nativeOutput$partialSurv,
c(n, length(partial.values)),
dimnames=mort.names) else NULL)
}
else if (partial.type == "chf") {
nlsn.names <- list(NULL, NULL, NULL)
## Incoming from the native code:
## type = chf
## -> of dim [length(partial.values)] x [1] x [length(partial.time)] x [n]
## Outgoing to the R code:
## -> of dim [n] x [length(partial.time)] x [length(partial.values)]
survOutput <- (if (!is.null(nativeOutput$partialSurv))
array(nativeOutput$partialSurv,
c(n, length(event.info$time.interest), length(partial.values)),
dimnames=nlsn.names) else NULL)
if (!is.null(survOutput)) {
survOutput <- survOutput[, partial.time.idx, , drop=FALSE]
}
}
else if (partial.type == "surv") {
surv.names <- list(NULL, NULL, NULL)
## Incoming from the native code:
## type = surv
## -> of dim [length(partial.values)] x [1] x [length(partial.time)] x [n]
## Outgoing to the R code:
## -> of dim [n] x [length(partial.time)] x [length(partial.values)]
survOutput <- (if (!is.null(nativeOutput$partialSurv))
array(nativeOutput$partialSurv,
c(n, length(event.info$time.interest), length(partial.values)),
dimnames=surv.names) else NULL)
if (!is.null(survOutput)) {
survOutput <- survOutput[, partial.time.idx, , drop=FALSE]
}
}
else {
stop("Invalid choice for 'partial.type' option: ", partial.type)
}
rfsrcOutput <- c(rfsrcOutput, survOutput = list(survOutput))
}
else if (family == "surv-CR") {
if (partial.type == "years.lost") {
yrls.names <- list(NULL, NULL, NULL)
## Incoming from the native code:
## type = years.lost
## -> of dim [length(partial.values)] x [length(event.info$event.type)] x [1] x [n]
## Outgoing to the R code:
## -> of dim [n] x [length(event.info$event.type)] x [length(partial.values)]
survOutput <- (if (!is.null(nativeOutput$partialSurv))
array(nativeOutput$partialSurv,
c(n, length(event.info$event.type), length(partial.values)),
dimnames=yrls.names) else NULL)
}
else if (partial.type == "cif") {
cifn.names <- list(NULL, NULL, NULL, NULL)
## Incoming from the native code:
## type = cif
## -> of dim [length(partial.values)] x [length(event.info$event.type)] x [length(partial.time)] x [n]
## Outgoing to the R code:
## -> of dim [n] x [length(partial.time)] x [length(event.info$event.type)] x [length(partial.values)]
survOutput <- (if (!is.null(nativeOutput$partialSurv))
array(nativeOutput$partialSurv,
c(n, length(event.info$time.interest), length(event.info$event.type), length(partial.values)),
dimnames=cifn.names) else NULL)
if (!is.null(survOutput)) {
survOutput <- survOutput[, partial.time.idx, , , drop=FALSE]
}
}
else if (partial.type == "chf") {
chfn.names <- list(NULL, NULL, NULL, NULL)
## Incoming from the native code:
## type = chfn
## -> of dim [length(partial.values)] x [length(event.info$event.type)] x [length(partial.time)] x [n]
## Outgoing to the R code:
## -> of dim [n] x [length(partial.time)] x [length(event.info$event.type)] x [length(partial.values)]
survOutput <- (if (!is.null(nativeOutput$partialSurv))
array(nativeOutput$partialSurv,
c(n, length(event.info$time.interest), length(event.info$event.type), length(partial.values)),
dimnames=chfn.names) else NULL)
if (!is.null(survOutput)) {
survOutput <- survOutput[, partial.time.idx, , , drop=FALSE]
}
}
else {
stop("Invalid choice for 'partial.type' option: ", partial.type)
}
rfsrcOutput <- c(rfsrcOutput, survOutput = list(survOutput))
}
else {
## We consider "R", "I", and "C" outcomes. The outcomes are grouped
## by type and sequential. That is, the first "C" encountered in the
## response type vector is in position [[1]] in the classification output
## list, the second "C" encountered is in position [[2]] in the
## classification output list, and so on. The same applies to the
## regression outputs. We also have a mapping from the outcome slot back
## to the original response vector type, given by the following:
## Given yvar.types = c("R", "C", "R", "C", "R" , "I")
## regr.index[1] -> 1
## regr.index[2] -> 3
## regr.index[3] -> 5
## clas.index[1] -> 2
## clas.index[2] -> 4
## clas.index[3] -> 6
## This will pick up all "C" and "I".
class.index <- which(yvar.types != "R")
class.count <- length(class.index)
regr.index <- which(yvar.types == "R")
regr.count <- length(regr.index)
if (class.count > 0) {
## Create and name the classification outputs.
classOutput <- vector("list", class.count)
names(classOutput) <- yvar.names[class.index]
## Vector to hold the number of levels in each factor response.
levels.count <- array(0, class.count)
## List to hold the names of levels in each factor response.
levels.names <- vector("list", class.count)
counter <- 0
for (i in class.index) {
counter <- counter + 1
## Note that [i] is the actual index of the y-variables and not a sequential iterator.
## The sequential iteratior is [counter]
levels.count[counter] <- yvar.nlevels[i]
if (yvar.types[i] == "C") {
## This an unordered factor.
## Here, we don't know the sequence of the unordered factor list, so we identify the factor by name.
levels.names[[counter]] <- yfactor$levels[[which(yfactor$factor == yvar.names[i])]]
}
else {
## This in an ordered factor.
## Here, we don't know the sequence of the ordered factor list, so we identify the factor by name.
levels.names[[counter]] <- yfactor$order.levels[[which(yfactor$order == yvar.names[i])]]
}
}
iter.start <- 0
iter.end <- 0
offset <- vector("list", class.count)
for (p in 1:length(partial.values)) {
for (k in 1:length(m.target.idx)) {
target.idx <- which (class.index == m.target.idx[k])
if (length(target.idx) > 0) {
iter.start <- iter.end
iter.end <- iter.start + ((1 + levels.count[target.idx]) * n)
offset[[target.idx]] <- c(offset[[target.idx]], (iter.start+1):iter.end)
}
}
}
for (i in 1:length(m.target.idx)) {
target.idx <- which (class.index == m.target.idx[i])
if (length(target.idx) > 0) {
ens.names <- list(NULL, c("all", levels.names[[target.idx]]), NULL)
## Incoming from the native code:
## type = NULL
## -> of dim [length(partial.values)] x [length(1 + yvar.nlevels[.]] x [n]
## Outgoing to the R code:
## -> of dim [n] x [1 + yvar.nlevels[.]] x [length(partial.values)]
ensemble <- (if (!is.null(nativeOutput$partialClas))
array(nativeOutput$partialClas[offset[[target.idx]]],
c(n, 1 + levels.count[target.idx], length(partial.values)),
dimnames=ens.names) else NULL)
classOutput[[target.idx]] <- ensemble
remove(ensemble)
}
}
rfsrcOutput <- c(rfsrcOutput, classOutput = list(classOutput))
}
if (regr.count > 0) {
## Create and name the classification outputs.
regrOutput <- vector("list", regr.count)
names(regrOutput) <- yvar.names[regr.index]
iter.start <- 0
iter.end <- 0
offset <- vector("list", regr.count)
for (p in 1:length(partial.values)) {
for (k in 1:length(m.target.idx)) {
target.idx <- which (regr.index == m.target.idx[k])
if (length(target.idx) > 0) {
iter.start <- iter.end
iter.end <- iter.start + n
offset[[target.idx]] <- c(offset[[target.idx]], (iter.start+1):iter.end)
}
}
}
for (i in 1:length(m.target.idx)) {
target.idx <- which (regr.index == m.target.idx[i])
if (length(target.idx) > 0) {
ens.names <- list(NULL, NULL)
## Incoming from the native code:
## type = NULL
## -> of dim [length(partial.values)] x [1] x [n]
## Outgoing to the R code:
## -> of dim [n] x [length(partial.values)]
ensemble <- (if (!is.null(nativeOutput$partialRegr))
array(nativeOutput$partialRegr[offset[[target.idx]]],
c(n, length(partial.values)),
dimnames=ens.names) else NULL)
regrOutput[[target.idx]] <- ensemble
remove(ensemble)
}
}
rfsrcOutput <- c(rfsrcOutput, regrOutput = list(regrOutput))
}
}
class(rfsrcOutput) <- c("rfsrc", "partial", family)
return (rfsrcOutput)
}
partial <- partial.rfsrc
get.partial <- function (partial.length) {
## Convert partial option into native code parameter.
if (!is.null(partial.length)) {
if (partial.length > 0) {
bits <- 2^14
}
else if (partial.length == 0) {
bits <- 0
}
else {
stop("Invalid choice for 'partial.length' option: ", partial.length)
}
}
else {
stop("Invalid choice for 'partial.length' option: ", partial.length)
}
return (bits)
}
get.type <- function (family, partial.type) {
if (family == "surv") {
## The native code interprets "rel.freq" as "mort". The R-side
## handles the difference downstream after native code exit.
if (partial.type == "rel.freq") {
partial.type <- "mort"
}
## Warning: Hard coded in global.h
type <- match(partial.type, c("mort", "chf", "surv"))
}
else if (family == "surv-CR") {
## Warning: Hard coded in global.h
type <- match(partial.type, c("years.lost", "cif", "chf"))
}
else {
type <- 0
}
if (is.na(type)) {
stop("Invalid choice for 'partial.type' option: ", partial.type)
}
return (type)
}
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Defines functions partial.rfsrc
partial.rfsrc <- function(
object,
oob = TRUE,
m.target = NULL,
partial.type = NULL,
partial.xvar = NULL,
partial.values = NULL,
partial.xvar2 = NULL,
partial.values2 = NULL,
partial.time = NULL,
get.tree = NULL,
seed = NULL,
do.trace = FALSE,
...)
{
## hidden options
user.option <- list(...)
terminal.qualts <- is.hidden.terminal.qualts(user.option)
terminal.quants <- is.hidden.terminal.quants(user.option)
## Object consistency
## (TBD, TBD, TBD) Version checking is NOT implemented in this mode (TBD, TBD, TBD)
if (missing(object)) {
stop("object is missing!")
}
## coherence checks
if (sum(inherits(object, c("rfsrc", "grow"), TRUE) == c(1, 2)) != 2 &
sum(inherits(object, c("rfsrc", "forest"), TRUE) == c(1, 2)) != 2) {
stop("this function only works for objects of class `(rfsrc, grow)' or '(rfsrc, forest)'")
}
## anonymous not allowed
if (inherits(object, "anonymous")) {
stop("this function does work with anonymous forests")
}
## acquire the forest --> hereafter the object is the forest
if (sum(inherits(object, c("rfsrc", "grow"), TRUE) == c(1, 2)) == 2) {
if (is.forest.missing(object)) {
stop("The forest is empty. Re-run rfsrc (grow call) with forest=TRUE")
}
object <- object$forest
}
else {
## object is already a forest.
}
## convert oob to ensemble
if (oob) {
ensemble <- "oob"
}
else {
ensemble <- "inbag"
}
## multivariate family details
family <- object$family
splitrule <- object$splitrule
## pull the x-variable and y-outcome names from the grow object
xvar.names <- object$xvar.names
yvar.names <- object$yvar.names
## verify the x-var
if (length(which(xvar.names == partial.xvar)) != 1) {
stop("x-variable specified incorrectly: ", partial.xvar)
}
## verify the x-var2
if (!is.null(partial.xvar2)) {
if (length(partial.xvar2) != length(partial.values2)) {
stop("second order x-variable and value vectors not of same length: ", length(partial.xvar2), "vs", length(partial.values2))
}
for (i in 1:length(partial.xvar2)) {
if (length(which(xvar.names == partial.xvar2[i])) != 1) {
stop("second order x-variable element", i, "specified incorrectly: ", partial.xvar2[i])
}
}
}
## Caution: There are no checks on partial.type. Note that "rel.freq" and "mort"
## are equivalent from a native code perspective.
## Determine the immutable yvar factor map which is needed for
## classification sexp dimensioning. But, first convert object$yvar
## to a data frame which is required for factor processing
#object$yvar <- as.data.frame(object$yvar)
#colnames(object$yvar) <- yvar.names
yfactor <- object$yvar.factor
## multivariate family details
m.target.idx <- get.outcome.target(family, yvar.names, m.target)
## short cut to get the y-outcome type and number of levels
yvar.types <- yfactor$types
yvar.nlevels <- yfactor$nlevels
yvar.numeric.levels <- yfactor$numeric.levels
## recover the individual subject identifiers, if they exist.
subj <- object$subj
## Get event information for survival families.
event.info <- object$event.info
event.type <- event.info$event.type
## CR.bits assignment.
cr.bits <- get.cr.bits(family)
## Determine the immutable xvar factor map.
xfactor <- object$xvar.factor
## short cut to get the x-variable type and number of levels
xvar.types <- xfactor$types
xvar.nlevels <- xfactor$nlevels
xvar.numeric.levels <- xfactor$numeric.levels
## Initialize the number of trees in the forest.
ntree <- object$ntree
## Use the training data na.action protocol.
na.action = object$na.action
## Data conversion for training data.
xvar <- as.matrix(data.matrix(object$xvar))
yvar <- as.matrix(data.matrix(object$yvar))
## Set the y dimension.
r.dim <- ncol(cbind(yvar))
## remove row and column names for proper processing by the native code
## set the dimensions.
rownames(xvar) <- colnames(xvar) <- NULL
n.xvar <- ncol(xvar)
n <- nrow(xvar)
sampsize <- round(object$sampsize(n))
## Recover the case weights and bootstrap sample.
case.wt <- object$case.wt
samp <- object$samp
## There is no test data.
outcome = "train"
## Process the get.tree vector that specifies which trees we want
get.tree <- get.tree.index(get.tree, ntree)
## Initialize the low bits.
ensemble.bits <- get.ensemble(ensemble)
bootstrap.bits <- get.bootstrap(object$bootstrap)
na.action.bits <- get.na.action(na.action)
## Initalize the high bits
samptype.bits <- get.samptype(object$samptype)
partial.bits <- get.partial(length(partial.values))
terminal.qualts.bits <- get.terminal.qualts(terminal.qualts, object$terminal.qualts)
terminal.quants.bits <- get.terminal.quants(terminal.quants, object$terminal.quants)
seed <- get.seed(seed)
do.trace <- get.trace(do.trace)
## Check that hdim is initialized. If not, set it zero.
## This is necessary for backwards compatibility with 2.3.0
if (is.null(object$hdim)) {
hdim <- 0
}
else {
hdim <- object$hdim
}
## Marker for start of native forest topology. This can change with the outputs requested.
## For the arithmetic related to the pivot point, you need to refer to stackOutput.c and in
## particular, stackForestOutputObjects().
## added from generic.predict.rfsrc.R per UBK instruction 11/04/2019
if (hdim == 0) {
offset = 0
chunk = 0
} else {
## Offset starts at parmID2. We adjust for the presence of interactions.
offset = 7
## A chunk is parmID2, contPT2, contPTR2, mwcpSZ2.
chunk = 4
if (!is.null(object$base.learner)) {
if (object$base.learner$interact.depth > 1) {
## Offset with interactions is adjusted.
## Adjusted for AUGM_X1, AUGM_X2.
offset = 9
## A chunk is parmID2, contPT2, contPTR2, mwcpSZ2, augmXone2, augmXtwo2.
chunk = 6
}
}
}
pivot <- which(names(object$nativeArray) == "treeID")
nativeOutput <- tryCatch({.Call("rfsrcPredict",
as.integer(do.trace),
as.integer(seed),
as.integer(
ensemble.bits +
bootstrap.bits +
cr.bits),
as.integer(
samptype.bits +
na.action.bits +
terminal.qualts.bits +
terminal.quants.bits +
partial.bits),
## >>>> start of maxi forest object >>>>
as.integer(ntree),
as.integer(n),
list(as.integer(length(yvar.types)),
if (is.null(yvar.types)) NULL else as.character(yvar.types),
if (is.null(yvar.types)) NULL else as.integer(yvar.nlevels),
if (is.null(yvar.numeric.levels)) NULL else sapply(1:length(yvar.numeric.levels), function(nn) {as.integer(length(yvar.numeric.levels[[nn]]))}),
if (is.null(subj)) NULL else as.integer(subj),
if (is.null(event.type)) NULL else as.integer(length(event.type)),
if (is.null(event.type)) NULL else as.integer(event.type),
if (is.null(yvar.types)) NULL else as.double(as.vector(yvar))),
if (is.null(yvar.numeric.levels)) {
NULL
}
else {
lapply(1:length(yvar.numeric.levels),
function(nn) {as.integer(yvar.numeric.levels[[nn]])})
},
list(as.integer(n.xvar),
as.character(xvar.types),
if (is.null(xvar.types)) NULL else as.integer(xvar.nlevels),
if (is.null(xvar.numeric.levels)) NULL else sapply(1:length(xvar.numeric.levels), function(nn) {as.integer(length(xvar.numeric.levels[[nn]]))}),
as.double(as.vector(xvar))),
if (is.null(xvar.numeric.levels)) {
NULL
}
else {
lapply(1:length(xvar.numeric.levels),
function(nn) {as.integer(xvar.numeric.levels[[nn]])})
},
list(as.integer(length(case.wt)),
if (is.null(case.wt)) NULL else as.double(case.wt),
as.integer(sampsize),
if (is.null(samp)) NULL else as.integer(samp)),
list(if(is.null(event.info$time.interest)) as.integer(0) else as.integer(length(event.info$time.interest)),
if(is.null(event.info$time.interest)) NULL else as.double(event.info$time.interest)),
as.integer(object$totalNodeCount),
as.integer(object$seed),
as.integer(hdim),
## Object containing base learner settings, this is never NULL.
object$base.learner,
as.integer((object$nativeArray)$treeID),
as.integer((object$nativeArray)$nodeID),
## This is hc_zero. It is never NULL.
list(as.integer((object$nativeArray)$parmID),
as.double((object$nativeArray)$contPT),
as.integer((object$nativeArray)$mwcpSZ),
as.integer((object$nativeFactorArray)$mwcpPT)),
## This slot is hc_one_augm_intr. This slot can be NULL.
if (!is.null(object$base.learner)) {
if (object$base.learner$interact.depth > 1) {
list(as.integer((object$nativeArray)$pairCT),
as.integer((object$nativeArray)$augmXone),
as.integer((object$nativeArray)$augmXtwo))
} else { NULL }
} else { NULL },
## This slot is hc_one_augm_syth. This slot can be NULL.
if (!is.null(object$base.learner)) {
if (object$base.learner$synthetic.depth > 1) {
list(as.integer((object$nativeArray)$sythSZ),
as.integer((object$nativeArray)$augmXS))
} else { NULL }
} else { NULL },
## This slot is hc_one. This slot can be NULL.
if (hdim > 0) {
list(as.integer((object$nativeArray)$hcDim),
as.double((object$nativeArray)$contPTR))
} else { NULL },
## See the offset documentation in
## rfsrc.R after the nativeArray
## SEXP objects are populated in the
## post-forest parsing for an
## explanation of the offsets below.
## These offset are DIFFERENT than the offsets used to
##
if (hdim > 1) {
## parmIDx
lapply(0:(hdim-2), function(x) {as.integer(object$nativeArray[, offset + 1 + (chunk * x)])})
} else { NULL },
if (hdim > 1) {
## contPTx
lapply(0:(hdim-2), function(x) {as.double(object$nativeArray[ , offset + 2 + (chunk * x)])})
} else { NULL },
if (hdim > 1) {
## contPTRx
lapply(0:(hdim-2), function(x) {as.double(object$nativeArray[ , offset + 3 + (chunk * x)])})
} else { NULL },
if (hdim > 1) {
## mwcpSZx
lapply(0:(hdim-2), function(x) {as.integer(object$nativeArray[, offset + 4 + (chunk * x)])})
} else { NULL },
if (hdim > 1) {
## mwcpPTx
lapply(0:(hdim-2), function(x) {as.integer(object$nativeFactorArray[[x + 1]])})
} else { NULL },
if (hdim > 1) {
if (!is.null(object$base.learner)) {
if (object$base.learner$interact.depth > 1) {
## augmXonex
lapply(0:(hdim-2), function(x) {as.integer(object$nativeArray[ , offset + 5 + (chunk * x)])})
} else { NULL }
} else { NULL }
} else { NULL },
if (hdim > 1) {
if (!is.null(object$base.learner)) {
if (object$base.learner$interact.depth > 1) {
## augmXtwox
lapply(0:(hdim-2), function(x) {as.integer(object$nativeArray[ , offset + 6 + (chunk * x)])})
} else { NULL }
} else { NULL }
} else { NULL },
if (hdim > 1) {
if (!is.null(object$base.learner)) {
if (object$base.learner$synthetic.depth > 1) {
## augmXSx
lapply(0:(hdim-2), function(x) {as.integer(object$nativeArray[ , offset + (if(object$base.learner$interact.depth > 1) 7 else 5) + (chunk * x)])})
} else { NULL }
} else { NULL }
} else { NULL },
## This slot is the synthetic topology!
if (hdim > 0) {
if (!is.null(object$base.learner)) {
if (object$base.learner$synthetic.depth > 1) {
if (!is.null(object$nativeArraySyth)) {
list(as.integer(object$nodeCountSyth),
as.integer((object$nativeArraySyth)$treeID),
as.integer((object$nativeArraySyth)$nodeID),
as.integer((object$nativeArraySyth)$hcDim),
as.integer((object$nativeArraySyth)$parmID),
as.double((object$nativeArraySyth)$contPT),
as.double((object$nativeArraySyth)$contPTR),
as.integer((object$nativeArraySyth)$mwcpSZ),
as.integer((object$nativeFactorArray)$mwcpPT))
} else { NULL }
} else { NULL }
} else { NULL }
} else { NULL },
as.integer(object$nativeArrayTNDS$tnRMBR),
as.integer(object$nativeArrayTNDS$tnAMBR),
as.integer(object$nativeArrayTNDS$tnRCNT),
as.integer(object$nativeArrayTNDS$tnACNT),
as.double((object$nativeArrayTNDS$tnSURV)),
as.double((object$nativeArrayTNDS$tnMORT)),
as.double((object$nativeArrayTNDS$tnNLSN)),
as.double((object$nativeArrayTNDS$tnCSHZ)),
as.double((object$nativeArrayTNDS$tnCIFN)),
as.double((object$nativeArrayTNDS$tnREGR)),
as.integer((object$nativeArrayTNDS$tnCLAS)),
## <<<< end of maxi forest object <<<<
list(if (is.null(m.target.idx)) as.integer(0) else as.integer(length(m.target.idx)),
if (is.null(m.target.idx)) NULL else as.integer(m.target.idx)),
as.integer(0), ## Pruning disabled
NULL,
list(as.integer(0), NULL), ## Importance disabled.
## Partial variables enabled. Note the as.integer is needed.
list(as.integer(get.type(family, partial.type)),
as.integer(which(xvar.names == partial.xvar)),
as.integer(length(partial.values)),
as.double(partial.values),
as.integer(length(partial.xvar2)),
if (length(partial.xvar2) == 0) NULL else as.integer(match(partial.xvar2, xvar.names)),
as.double(partial.values2)),
as.integer(0), ## New data disabled.
as.integer(0), ## New data disabled.
as.double(NULL), ## New data disabled.
as.double(NULL), ## New data disabled.
as.integer(ntree), ## block.size is hard-coded.
list(as.integer(0),
NULL,
as.double(0)), ## Quantiles disabled.
as.integer(get.tree),
as.integer(get.rf.cores()))}, error = function(e) {
print(e)
NULL})
## check for error return condition in the native code
if (is.null(nativeOutput)) {
stop("An error has occurred in prediction. Please turn trace on for further analysis.")
}
rfsrcOutput <- list(call = match.call(),
family = family,
partial.time = partial.time)
## Subset the user time vector from the grow time interest vector.
if (grepl("surv", family)) {
## Get the indices of the closest points of the grow time interest vector.
## Exact:
## partial.time.idx <- match(partial.time, event.info$time.interest)
## Closest:
partial.time.idx <- sapply(partial.time, function(x) {max(which(event.info$time.interest <= x))})
if (sum(is.na(partial.time.idx)) > 0) {
stop("partial.time must be a subset of the time interest vector contained in the model")
}
}
if (family == "surv") {
if ((partial.type == "rel.freq") || (partial.type == "mort")) {
mort.names <- list(NULL, NULL)
## Incoming from the native code:
## type = mort
## -> of dim [length(partial.values)] x [1] x [1] x [n]
## Outgoing to the R code:
## -> of dim [n] x [length(partial.values)]
survOutput <- (if (!is.null(nativeOutput$partialSurv))
array(nativeOutput$partialSurv,
c(n, length(partial.values)),
dimnames=mort.names) else NULL)
}
else if (partial.type == "chf") {
nlsn.names <- list(NULL, NULL, NULL)
## Incoming from the native code:
## type = chf
## -> of dim [length(partial.values)] x [1] x [length(partial.time)] x [n]
## Outgoing to the R code:
## -> of dim [n] x [length(partial.time)] x [length(partial.values)]
survOutput <- (if (!is.null(nativeOutput$partialSurv))
array(nativeOutput$partialSurv,
c(n, length(event.info$time.interest), length(partial.values)),
dimnames=nlsn.names) else NULL)
if (!is.null(survOutput)) {
survOutput <- survOutput[, partial.time.idx, , drop=FALSE]
}
}
else if (partial.type == "surv") {
surv.names <- list(NULL, NULL, NULL)
## Incoming from the native code:
## type = surv
## -> of dim [length(partial.values)] x [1] x [length(partial.time)] x [n]
## Outgoing to the R code:
## -> of dim [n] x [length(partial.time)] x [length(partial.values)]
survOutput <- (if (!is.null(nativeOutput$partialSurv))
array(nativeOutput$partialSurv,
c(n, length(event.info$time.interest), length(partial.values)),
dimnames=surv.names) else NULL)
if (!is.null(survOutput)) {
survOutput <- survOutput[, partial.time.idx, , drop=FALSE]
}
}
else {
stop("Invalid choice for 'partial.type' option: ", partial.type)
}
rfsrcOutput <- c(rfsrcOutput, survOutput = list(survOutput))
}
else if (family == "surv-CR") {
if (partial.type == "years.lost") {
yrls.names <- list(NULL, NULL, NULL)
## Incoming from the native code:
## type = years.lost
## -> of dim [length(partial.values)] x [length(event.info$event.type)] x [1] x [n]
## Outgoing to the R code:
## -> of dim [n] x [length(event.info$event.type)] x [length(partial.values)]
survOutput <- (if (!is.null(nativeOutput$partialSurv))
array(nativeOutput$partialSurv,
c(n, length(event.info$event.type), length(partial.values)),
dimnames=yrls.names) else NULL)
}
else if (partial.type == "cif") {
cifn.names <- list(NULL, NULL, NULL, NULL)
## Incoming from the native code:
## type = cif
## -> of dim [length(partial.values)] x [length(event.info$event.type)] x [length(partial.time)] x [n]
## Outgoing to the R code:
## -> of dim [n] x [length(partial.time)] x [length(event.info$event.type)] x [length(partial.values)]
survOutput <- (if (!is.null(nativeOutput$partialSurv))
array(nativeOutput$partialSurv,
c(n, length(event.info$time.interest), length(event.info$event.type), length(partial.values)),
dimnames=cifn.names) else NULL)
if (!is.null(survOutput)) {
survOutput <- survOutput[, partial.time.idx, , , drop=FALSE]
}
}
else if (partial.type == "chf") {
chfn.names <- list(NULL, NULL, NULL, NULL)
## Incoming from the native code:
## type = chfn
## -> of dim [length(partial.values)] x [length(event.info$event.type)] x [length(partial.time)] x [n]
## Outgoing to the R code:
## -> of dim [n] x [length(partial.time)] x [length(event.info$event.type)] x [length(partial.values)]
survOutput <- (if (!is.null(nativeOutput$partialSurv))
array(nativeOutput$partialSurv,
c(n, length(event.info$time.interest), length(event.info$event.type), length(partial.values)),
dimnames=chfn.names) else NULL)
if (!is.null(survOutput)) {
survOutput <- survOutput[, partial.time.idx, , , drop=FALSE]
}
}
else {
stop("Invalid choice for 'partial.type' option: ", partial.type)
}
rfsrcOutput <- c(rfsrcOutput, survOutput = list(survOutput))
}
else {
## We consider "R", "I", and "C" outcomes. The outcomes are grouped
## by type and sequential. That is, the first "C" encountered in the
## response type vector is in position [[1]] in the classification output
## list, the second "C" encountered is in position [[2]] in the
## classification output list, and so on. The same applies to the
## regression outputs. We also have a mapping from the outcome slot back
## to the original response vector type, given by the following:
## Given yvar.types = c("R", "C", "R", "C", "R" , "I")
## regr.index[1] -> 1
## regr.index[2] -> 3
## regr.index[3] -> 5
## clas.index[1] -> 2
## clas.index[2] -> 4
## clas.index[3] -> 6
## This will pick up all "C" and "I".
class.index <- which(yvar.types != "R")
class.count <- length(class.index)
regr.index <- which(yvar.types == "R")
regr.count <- length(regr.index)
if (class.count > 0) {
## Create and name the classification outputs.
classOutput <- vector("list", class.count)
names(classOutput) <- yvar.names[class.index]
## Vector to hold the number of levels in each factor response.
levels.count <- array(0, class.count)
## List to hold the names of levels in each factor response.
levels.names <- vector("list", class.count)
counter <- 0
for (i in class.index) {
counter <- counter + 1
## Note that [i] is the actual index of the y-variables and not a sequential iterator.
## The sequential iteratior is [counter]
levels.count[counter] <- yvar.nlevels[i]
if (yvar.types[i] == "C") {
## This an unordered factor.
## Here, we don't know the sequence of the unordered factor list, so we identify the factor by name.
levels.names[[counter]] <- yfactor$levels[[which(yfactor$factor == yvar.names[i])]]
}
else {
## This in an ordered factor.
## Here, we don't know the sequence of the ordered factor list, so we identify the factor by name.
levels.names[[counter]] <- yfactor$order.levels[[which(yfactor$order == yvar.names[i])]]
}
}
iter.start <- 0
iter.end <- 0
offset <- vector("list", class.count)
for (p in 1:length(partial.values)) {
for (k in 1:length(m.target.idx)) {
target.idx <- which (class.index == m.target.idx[k])
if (length(target.idx) > 0) {
iter.start <- iter.end
iter.end <- iter.start + ((1 + levels.count[target.idx]) * n)
offset[[target.idx]] <- c(offset[[target.idx]], (iter.start+1):iter.end)
}
}
}
for (i in 1:length(m.target.idx)) {
target.idx <- which (class.index == m.target.idx[i])
if (length(target.idx) > 0) {
ens.names <- list(NULL, c("all", levels.names[[target.idx]]), NULL)
## Incoming from the native code:
## type = NULL
## -> of dim [length(partial.values)] x [length(1 + yvar.nlevels[.]] x [n]
## Outgoing to the R code:
## -> of dim [n] x [1 + yvar.nlevels[.]] x [length(partial.values)]
ensemble <- (if (!is.null(nativeOutput$partialClas))
array(nativeOutput$partialClas[offset[[target.idx]]],
c(n, 1 + levels.count[target.idx], length(partial.values)),
dimnames=ens.names) else NULL)
classOutput[[target.idx]] <- ensemble
remove(ensemble)
}
}
rfsrcOutput <- c(rfsrcOutput, classOutput = list(classOutput))
}
if (regr.count > 0) {
## Create and name the classification outputs.
regrOutput <- vector("list", regr.count)
names(regrOutput) <- yvar.names[regr.index]
iter.start <- 0
iter.end <- 0
offset <- vector("list", regr.count)
for (p in 1:length(partial.values)) {
for (k in 1:length(m.target.idx)) {
target.idx <- which (regr.index == m.target.idx[k])
if (length(target.idx) > 0) {
iter.start <- iter.end
iter.end <- iter.start + n
offset[[target.idx]] <- c(offset[[target.idx]], (iter.start+1):iter.end)
}
}
}
for (i in 1:length(m.target.idx)) {
target.idx <- which (regr.index == m.target.idx[i])
if (length(target.idx) > 0) {
ens.names <- list(NULL, NULL)
## Incoming from the native code:
## type = NULL
## -> of dim [length(partial.values)] x [1] x [n]
## Outgoing to the R code:
## -> of dim [n] x [length(partial.values)]
ensemble <- (if (!is.null(nativeOutput$partialRegr))
array(nativeOutput$partialRegr[offset[[target.idx]]],
c(n, length(partial.values)),
dimnames=ens.names) else NULL)
regrOutput[[target.idx]] <- ensemble
remove(ensemble)
}
}
rfsrcOutput <- c(rfsrcOutput, regrOutput = list(regrOutput))
}
}
class(rfsrcOutput) <- c("rfsrc", "partial", family)
return (rfsrcOutput)
}
partial <- partial.rfsrc
get.partial <- function (partial.length) {
## Convert partial option into native code parameter.
if (!is.null(partial.length)) {
if (partial.length > 0) {
bits <- 2^14
}
else if (partial.length == 0) {
bits <- 0
}
else {
stop("Invalid choice for 'partial.length' option: ", partial.length)
}
}
else {
stop("Invalid choice for 'partial.length' option: ", partial.length)
}
return (bits)
}
get.type <- function (family, partial.type) {
if (family == "surv") {
## The native code interprets "rel.freq" as "mort". The R-side
## handles the difference downstream after native code exit.
if (partial.type == "rel.freq") {
partial.type <- "mort"
}
## Warning: Hard coded in global.h
type <- match(partial.type, c("mort", "chf", "surv"))
}
else if (family == "surv-CR") {
## Warning: Hard coded in global.h
type <- match(partial.type, c("years.lost", "cif", "chf"))
}
else {
type <- 0
}
if (is.na(type)) {
stop("Invalid choice for 'partial.type' option: ", partial.type)
}
return (type)
}
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