Hi > x<-1:100 > y<-1:100 > z<-rnorm(100*100) > dim(z)<-c(100,100) > persp(x,y,z)
works ok so problem is with your data. "Z" being OK in Minitab does not mean it is read OK to R. On 5 Feb 2007 at 5:50, Tom H. wrote: Date sent: Mon, 5 Feb 2007 05:50:34 -0800 (PST) From: "Tom H." <[EMAIL PROTECTED]> To: [email protected] Subject: [R] Beginner Question on Persp() > > I recently downloaded R for Windows, running on Win XP. I'm trying to > create a perspective plot but not having any luck after reading the R > manual and several examples found on the Internet. > > I have a 100 x 100 matrix of Z data as a tab-delimited text file > exported from Minitab. I read this in to R using read.delim; this > seemed to go ok. I created X and Y using seq() to get 100 divisions what does str(Z) says about your data? z<-list(z) > persp(x,y,z) Error in persp.default(x, y, z) : (list) object cannot be coerced to 'double' so although z looks like matrix it is actually list z1<-z[[1]] persp(x,y,z1) works again OK. Based on structure of your data you need to extract a matrix for using it as z. See ?persp HTH Petr BTW try to transfer it to R just by selection of data list in Minitab, pressing Ctrl-C, and using z <- read.delim("clipboard") in R. It works for me. > for the X and Y axes. Again, everything looked good, when I typed X or > Y I got a string of 100 numbers. > > However, when I try to do persp(x,y,z) I get an error something like: > (list) cannot be coerced to double. I know the basic data (matrix of > z values) is ok (no hidden non-numeric values) because Minitab will > graph it just fine. Any suggestions on how to proceed? Thanks in > advanced for your help. -- View this message in context: > http://www.nabble.com/Beginner-Question-on-Persp%28%29-tf3174399.html# > a8806483 Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > [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 and provide commented, > minimal, self-contained, reproducible code. Petr Pikal [EMAIL PROTECTED] ______________________________________________ [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 and provide commented, minimal, self-contained, reproducible code.
