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
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