Say x=1,2 and y=4,5 I want to summarize z only if x=1 & y=4. I thought that the way to do that would be to write if((x=1) & (y=4)) summary(z) butwhen I do this the result I get is for the whole data (irrespective of the conditions imposed). Can anyone help?
There are actually worse problems with
if((x=1) & (y=4)) summary(z) than that: you have just set x to 1 and y to 4.
You can do summary(z[(x==1) & (y==4)]) to get the answer you want (or various other things)
You really need to read the Introduction to R, which will tell you, among other things, what the = operator does.
-thomas
______________________________________________ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
