Histogram
Mea Culpa I did copy and paste your code to make sure it was an error. I'll go and do it again before I reply. It worked as you expected it to. So I located where I had done it and this is what I found
f <- factor(sample(c("A", "B"), 50, replace=TRUE))
hist(f)
Error in hist.default(f) : 'x' must be numeric Since I had more than one session open I had inadvertantly pasted the
hist.factor <- function(x, ...) barplot(table(x), ...)
into another window. For some reason or other I have always had finger trouble with the "paste commands only" in the windows GUI, so I do it one line at a time or past into Tinn-R and select with the alt key. I guess its time for me to actually understand methods, because it's patently obvious I don't even though I was beginning to think I had a handle on them. Tom
-----Original Message----- From: Liaw, Andy [mailto:andy_liaw at merck.com] Sent: Thursday, 21 April 2005 10:06 AM To: Mulholland, Tom Subject: RE: [R] Histogram Have you tried it? hist.factor() as defined would be the hist method for the factor class, so hist(f) would work if f is a factor. Andy
From: Mulholland, Tom Of course Andy meant hist.factor(f) In particular you should note that Andy uses the table function to "transform ... the data from characters to numbers" Tom
-----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
You can try:
hist.factor <- function(x, ...) barplot(table(x), ...)
f <- factor(sample(c("A", "B"), 50, replace=TRUE))
hist(f)
HTH, Andy
Thank you in advance!
______________________________________________ R-help at stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
-------------------------------------------------------------- ---------------- Notice: This e-mail message, together with any attachments, contains information of Merck & Co., Inc. (One Merck Drive, Whitehouse Station, New Jersey, USA 08889), and/or its affiliates (which may be known outside the United States as Merck Frosst, Merck Sharp & Dohme or MSD and in Japan, as Banyu) that may be confidential, proprietary copyrighted and/or legally privileged. It is intended solely for the use of the individual or entity named on this message. If you are not the intended recipient, and have received this message in error, please notify us immediately by reply e-mail and then delete it from your system. -------------------------------------------------------------- ----------------