Re: [R] why this doesn't work for qqnorm You need to specify a whole column. try qqnorm(table[,1]) On Thu, 2007-06-28 at 18:50 -0700, Jiong Zhang, PhD wrote: > I want to qqnorm every column in a table.  When I try the first column > using >  > qqnorm(table$column1), it worked. >  > But when I use >  > qqnorm(table[1]), it tells me "Error in stripchart(x1, ...) : invalid > plotting method". >  > What happen?  How can I make a function that qqnorms every column? Try this: dat <- data.frame(x=rnorm(20), y= rnorm(20), z =rnorm(20)) par(mfrow=c(3,1)) sapply(dat, function (x) {qqnorm (x) ; qqline (x) } ) Cheers, Simon >  > thanks a lot. >  > -jiong >  The email message (and any attachments) is for the sole use of the intended recipient(s) and may contain confidential information.  Any unauthorized review, use, disclosure or distribution is prohibited.  If you are not the intended recipient, please contact the sender by reply email and destroy all copies of the original message (and any attachments).  Thank You. >  >  >  > 	[[alternative HTML version deleted]] >  > ______________________________________________ > R-help@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 > and provide commented, minimal, self-contained, reproducible code. --  Simon Blomberg, BSc (Hons), PhD, MAppStat.  Lecturer and Consultant Statistician  Faculty of Biological and Chemical Sciences  The University of Queensland  St. Lucia Queensland 4072  Australia Room 320, Goddard Building (8) T: +61 7 3365 2506  email: S.Blomberg1_at_uq.edu.au  The combination of some data and an aching desire for  an answer does not ensure that a reasonable answer can  be extracted from a given body of data. - John Tukey. ______________________________________________ R-help@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 and provide commented, minimal, self-contained, reproducible code.