Nothing
get_os <- function() {
if (.Platform$OS.type == "windows") { ## does not distinguish OSX (BSD) and mote standard unix-like systems
"Windows"
} else if (Sys.info()["sysname"] == "Darwin") { ## => OS X (or how to mess things)
"OSX"
} else if (.Platform$OS.type == "unix") {
"unix"
} else {
stop("Unknown OS") ## but see http://conjugateprior.org/2015/06/identifying-the-os-from-r/
}
}
RAMavail <- function() {
## windows case must be incorrect
os <- get_os()
if (os=="Windows") {
avail <- Inf # quick patch # memory.size() ## FR->FR RAMused rather than available ?
} else if (os=="OSX") {
bla <- system2("vm_stat",stdout=TRUE)[2] ## [1] => Free (but not Inactive)
allpos <- gregexpr(" [0-9]",bla)[[1]] ## positions of blanks before numbers
begpos <- 1L + allpos[length(allpos)]
avail <- as.numeric(substr(bla,begpos,nchar(bla))) ## get last numeric value on the string
} else { ## assuming unix-like system with a "free" function
bla <- system2("free","-m",stdout=TRUE)[3] ## -m for value in Mo; [3] => "-/+ buffers/cache" line
allpos <- gregexpr(" [0-9]",bla)[[1]] ## positions of blanks before numbers
begpos <- 1L + allpos[length(allpos)]
avail <- as.numeric(substr(bla,begpos,nchar(bla))) ## get last numeric value on the string
}
return(avail)
}
## function for memory management
#http://stackoverflow.com/questions/1358003/tricks-to-manage-the-available-memory-in-an-r-session
.ls.objects <- function (pos = 1, pattern, order.by,
decreasing=FALSE, head=FALSE, n=5) {
napply <- function(names, fn) sapply(names, function(x)
fn(get(x, pos = pos)))
names <- ls(all.names=TRUE,name = pos, pattern = pattern) ## FR 2015/09 name=pos, all=TRUE
obj.class <- napply(names, function(x) as.character(class(x))[1])
obj.mode <- napply(names, mode)
obj.type <- ifelse(is.na(obj.class), obj.mode, obj.class)
obj.size <- napply(names, object.size)
obj.dim <- t(napply(names, function(x)
as.numeric(dim(x))[1:2]))
vec <- is.na(obj.dim)[, 1] & (obj.type != "function")
obj.dim[vec, 1] <- napply(names, length)[vec]
out <- data.frame(obj.type, obj.size, obj.dim)
names(out) <- c("Type", "Size", "Rows", "Columns")
if (!missing(order.by))
out <- out[order(out[[order.by]], decreasing=decreasing), ]
if (head)
out <- head(out, n)
out
}
# shorthands
lsos <- function(..., n=10) {
.ls.objects(..., order.by="Size", decreasing=TRUE, head=TRUE, n=n)
}
#
lsOK <- function(which=1, n=10, ...) {
## still not fully effective, as e.g. lsOK(parent.frame()) will try (and fail) to evaluate ls.objects on each element of the evaluated frame...
bla <- lapply(which,.ls.objects,..., order.by="Size", decreasing=TRUE, head=TRUE, n=n)
if(length(which)>1L) {
bla <- do.call(rbind,bla)
} else bla <- bla[[1]]
bla
}
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