Nothing
#' @importFrom stats median predict quantile
additivePlot <- function(x, data, n = 100, quant = 0, plot = TRUE, ...)
{
if(inherits(x, "earth"))
{
data <- data[, predictors(x), drop = FALSE]
}
seqs <- lapply(data,
function(x, len, q) list(seq = seq(
quantile(x, na.rm = TRUE, probs = q),
quantile(x, na.rm = TRUE, probs = 1 - q),
length = len),
var = ""),
len = n,
q = quant)
for(i in seq(along = seqs)) seqs[[i]]$var <- colnames(data)[i]
meds <- lapply(data,
function(x, len) rep(median(x, na.rm = TRUE), len),
len = n)
meds <- as.data.frame(meds, stringsAsFactors = TRUE)
predGrid <- lapply(seqs,
function(x, m)
{
m[, x$var] <- x$seq
m$variable <- x$var
m
},
m = meds)
predGrid <- do.call("rbind", predGrid)
predGrid$predicted <- predict(x, predGrid[, colnames(data), drop = FALSE], ...)
predGrid$x <- unlist(lapply(seqs, function(x) x$seq))
if(plot)
{
out <- xyplot(predicted ~ x|variable,
data = predGrid,
between = list(x = 2),
scales = list(x = list(relation = "free")),
as.table = TRUE,
xlab = "",
ylab = "Predicted",
type = "l")
} else out <- predGrid
out
}
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