-----Original Message-----
From: r-help-bounces at stat.math.ethz.ch
[mailto:r-help-bounces at stat.math.ethz.ch]On Behalf Of Liaw, Andy
Sent: Thursday, 21 April 2005 12:14 AM
To: 'ferri.leberl at gmx.at'; r-help at stat.math.ethz.ch
Subject: RE: [R] Histogram
From: Mag. Ferri Leberl
Dear everybody!
I am analysing data from an enquette. The answers are either
A or B. How can I
draw a histogram without transforming the data from
characters to numbers? If
the data are saved in a list M, hist(M[,1]) returns:
Error in hist.default(M[, 1]) : `x' must be numeric
Execution halted
hist.factor <- function(x, ...) barplot(table(x), ...)
f <- factor(sample(c("A", "B"), 50, replace=TRUE))
hist(f)