swh:1:snp:81eadaa089e8253d8469bcef66aa332632c6c669
Tip revision: 6b5162225f1e90f742ac53c32bf06c8053cff577 authored by HwB on 26 July 2011, 00:00:00 UTC
version 0.7.5
version 0.7.5
Tip revision: 6b51622
std.R
##
## s t d . R
##
std <- function(x, flag=0) {
if (length(x) == 0) return(c())
if (!is.numeric(x))
stop("Argument 'x' must be a numeric vector or matrix.")
n <- if (flag == 0) length(x) - 1 else length(x)
sqrt(sum((x-mean(x))*(x-mean(x)))/n)
}
std_err <- function(x) {
if (length(x) == 0) return(c())
if (!is.numeric(x))
stop("Argument 'x' must be a numeric vector or matrix.")
sqrt(var(x)/length(x))
}