[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 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. __ 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.
Re: [R] Beginner Question on Persp()
Tom H. wrote: 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 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. Data frames are not matrices. Presumably, you want as.matrix(z). -- O__ Peter Dalgaard Øster Farimagsgade 5, Entr.B c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~ - ([EMAIL PROTECTED]) FAX: (+45) 35327907 __ 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.
Re: [R] Beginner Question on Persp()
read.delim creates a data frame (which is a type of list), whereas persp requires that the z argument be a matrix. These are different classes of object in R -- you might want to read the Introduction to R that ships with the programme. Try persp(x,y,as.matrix(z)) On 05/02/07, Tom H. [EMAIL PROTECTED] wrote: 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 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. __ 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. -- = David Barron Said Business School University of Oxford Park End Street Oxford OX1 1HP __ 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.
Re: [R] Beginner Question on Persp()
Your ``z'' which was read in by read.delim() is a *data frame* not a matrix. Do z - as.matrix(z), then persp(x,y,z) will work. cheers, Rolf Turner [EMAIL PROTECTED] ===+===+===+===+===+===+===+===+===+===+===+===+===+===+===+===+===+===+=== Original message: 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 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. __ 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.
Re: [R] Beginner Question on Persp()
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: r-help@stat.math.ethz.ch 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. __ 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. Petr Pikal [EMAIL PROTECTED] __ 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.
Re: [R] Beginner Question on Persp()
Thank you all for taking the time to point out that a data frame is not the same as a matrix! I'll give it another shot when I get home tonight. -- View this message in context: http://www.nabble.com/Beginner-Question-on-Persp%28%29-tf3174399.html#a8807536 Sent from the R help mailing list archive at Nabble.com. __ 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.
Re: [R] Beginner Question on Persp()
Tom H. wrote: 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 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#a8807458 Sent from the R help mailing list archive at Nabble.com. __ 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.
