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nfac
2005 Sep 20
5
Neat way of using R for pivoting?
...3.1
I want to produce a plot of SNR vs mean(timeError) with error bars of
magnitude 3 sigma.
here's what I've got so far (without the error bars. I can't do that yet).
I'm sure it's the wrong way to go about this:
******* BEGIN SNIPPET *******
get_stats <- function(t) {
cnfac <- factor(t$cnset);
mu <- as.list(by(t$snr, cnfac, mean));
tvar <- as.list(by(t$snr, cnfac, var));
t <- list(mu=mu, var=tvar);
}
vn <- read.table('vn.csv', sep=',');
vn_stats <- get_stats(vn);
vsn <- read.table('vsn.csv', sep=',');
vsn_stats &l...