Nothing
checkInstall <- function(pkg){
good <- rep(TRUE, length(pkg))
for(i in seq(along = pkg)){
tested <- try(find.package(pkg[i]), silent = TRUE)
if(class(tested)[1] == "try-error") good[i] <- FALSE
}
if(any(!good)){
pkList <- paste(pkg[!good], collapse = ", ")
msg <- paste(sum(!good),
ifelse(sum(!good) > 1, " packages are", " package is"),
" needed for this model and",
ifelse(sum(!good) > 1, " are", " is"),
" not installed. (",
pkList,
"). Would you like to try to install",
ifelse(sum(!good) > 1, " them", " it"),
" now?",
sep = "")
cat(msg)
if(interactive()) {
bioc <- c("affy", "logicFS", "gpls", "vbmp")
installChoice <- menu(c("yes", "no"))
if(installChoice == 1){
hasBioc <- any(pkg[!good] %in% bioc)
if(!hasBioc) {
install.packages(pkg[!good])
} else {
inst <- pkg[!good]
instC <- inst[!(inst %in% bioc)]
instB <- inst[inst %in% bioc]
if(length(instC) > 0) install.packages(instC)
biocLite <- NULL
source("http://bioconductor.org/biocLite.R")
biocLite(instB)
}
} else stop()
} else stop()
}
}
getModelInfo <- function(model = NULL, regex = TRUE, ...) {
load(system.file("models", "models.RData", package = "caret"))
if(!is.null(model)){
keepers <- if(regex) grepl(model, names(models), ...) else which(model == names(models))[1]
models <- models[keepers]
}
if(length(models) == 0) stop("That model is not in caret's built-in library")
models
}
modelLookup <- function(model = NULL){
load(system.file("models", "models.RData", package = "caret"))
if(!is.null(model)){
if(!(model %in% names(models))) stop(paste("Model '", method, "' is not in the ",
"set of existing models", sep = ""))
models <- models[model == names(models)]
}
out <- lapply(models,
function(x) {
out <- x$parameters[, c("parameter", "label")]
out$forReg <- "Regression" %in% x$type
out$forClass <- "Classification" %in% x$type
out$probModel <- !is.null(x$prob)
out
})
for(i in seq(along = out)) out[[i]]$model <- names(models)[i]
out <- do.call("rbind", out)
rownames(out) <- NULL
out <- out[, c('model', 'parameter', 'label', 'forReg', 'forClass', 'probModel')]
out[order(out$model),]
}
missing_packages <- function(mods = getModelInfo()) {
libs <- unique(unlist(lapply(mods, function(x) x$library)))
here <- rownames(installed.packages())
libs[!(libs %in% here)]
}
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