swh:1:snp:81eadaa089e8253d8469bcef66aa332632c6c669
Tip revision: f2b1a2b0b321bb40a034d89a636072cd71ad25cc authored by HwB on 21 November 2011, 00:00:00 UTC
version 0.8.6
version 0.8.6
Tip revision: f2b1a2b
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))
}