Hi dear listers
Do you know how to made a mean by one or more categorical variables?
I can do that quite easy on SAS by in R I just can't do it E.g.
Some fishes
Sex Lenght
male15
fema20
fema17
fema19
,mean)
fema male
18.7 16.5
Sincerely,
Erin Hodgess
Associate Professor
Department of Computer and Mathematical Sciences
University of Houston - Downtown
mailto: [EMAIL PROTECTED]
From: Jorge Cornejo Donoso [EMAIL PROTECTED]
Subject: [R] RV: By sentence
Hi dear listers
Well, you want a mean of length BY sex, so look at by()...
See ?by
by(your.data.frame,sex,mean)
Petr
Jorge Cornejo Donoso napsal(a):
Hi dear listers
Do you know how to made a mean by one or more categorical variables?
I can do that quite easy on SAS by in R I just can't do it
