[R] Make a matrix from two lists
I am trying to write a function that makes a matrix out of two lists. As you will see run running the function below, the result is NOT a matrix but rather a list. Can anyone tell me what I am doing wrong? Thanks, John test - function(one,two) { cat(List One=,one,\n) cat(List Two=,two,\n) cat(Should be a matrix, but is not,matrix(cbind(one,two)),\n) } x - c(1,2,3) y - c(11,22,33) test(x,y) John David Sorkin M.D., Ph.D. Chief, Biostatistics and Informatics University of Maryland School of Medicine Division of Gerontology Baltimore VA Medical Center 10 North Greene Street GRECC (BT/18/GR) Baltimore, MD 21201-1524 (Phone) 410-605-7119 (Fax) 410-605-7913 (Please call phone number above prior to faxing) Confidentiality Statement: This email message, including any attachments, is for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized 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. __ R-help@r-project.org 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] Make a matrix from two lists
Hi, On Mar 29, 2013, at 1:29 PM, John Sorkin wrote: I am trying to write a function that makes a matrix out of two lists. As you will see run running the function below, the result is NOT a matrix but rather a list. Can anyone tell me what I am doing wrong? Thanks, John test - function(one,two) { cat(List One=,one,\n) cat(List Two=,two,\n) cat(Should be a matrix, but is not,matrix(cbind(one,two)),\n) } x - c(1,2,3) y - c(11,22,33) test(x,y) x - c(1,2,3) y - c(11,22,33) z - cbind(x,y) is.matrix(z) [1] TRUE As you can see above, I don't get the same result. I not sure if you want to see the matrix printed in matrix form when you have it in test(). If that were the case then you'll want to avoid cat() and use print() instead. test - function(one,two) { cat(List One=,one,\n) cat(List Two=,two,\n) z - cbind(one, two) print(z) } test(x,y) List One= 1 2 3 List Two= 11 22 33 one two [1,] 1 11 [2,] 2 22 [3,] 3 33 Cheers, Ben Ben Tupper Bigelow Laboratory for Ocean Sciences 60 Bigelow Drive, P.O. Box 380 East Boothbay, Maine 04544 http://www.bigelow.org __ R-help@r-project.org 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] Make a matrix from two lists
Ben, Thank you. When I used print I saw the matrix; the problem was as you indicated that I was using cat. Thanks, John John David Sorkin M.D., Ph.D. Chief, Biostatistics and Informatics University of Maryland School of Medicine Division of Gerontology Baltimore VA Medical Center 10 North Greene Street GRECC (BT/18/GR) Baltimore, MD 21201-1524 (Phone) 410-605-7119 (Fax) 410-605-7913 (Please call phone number above prior to faxing) Ben Tupper btup...@bigelow.org 3/29/2013 1:49 PM Hi, On Mar 29, 2013, at 1:29 PM, John Sorkin wrote: I am trying to write a function that makes a matrix out of two lists. As you will see run running the function below, the result is NOT a matrix but rather a list. Can anyone tell me what I am doing wrong? Thanks, John test - function(one,two) { cat(List One=,one,\n) cat(List Two=,two,\n) cat(Should be a matrix, but is not,matrix(cbind(one,two)),\n) } x - c(1,2,3) y - c(11,22,33) test(x,y) x - c(1,2,3) y - c(11,22,33) z - cbind(x,y) is.matrix(z) [1] TRUE As you can see above, I don't get the same result. I not sure if you want to see the matrix printed in matrix form when you have it in test(). If that were the case then you'll want to avoid cat() and use print() instead. test - function(one,two) { cat(List One=,one,\n) cat(List Two=,two,\n) z - cbind(one, two) print(z) } test(x,y) List One= 1 2 3 List Two= 11 22 33 one two [1,] 1 11 [2,] 2 22 [3,] 3 33 Cheers, Ben Ben Tupper Bigelow Laboratory for Ocean Sciences 60 Bigelow Drive, P.O. Box 380 East Boothbay, Maine 04544 http://www.bigelow.org Confidentiality Statement: This email message, including any attachments, is for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized 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. __ R-help@r-project.org 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.