Hello, I would like to use R in a laboratory. They use actually IML of the SAS-Society. With this IMLangage, you can enter a mathematical formula with sum from i to n, transpose matrix, sum of a colonne and all this stuff. After that, the software can translate it in a program. I am not currently use R in Matrix langage. But I manipulate data frame. I have the feeling that R can do like SAS do. What do you think about it? Thanks in advance, Pierre-Olivier Chasset
All of this is possible, and very easy, in R. See the Intro to R book. Doug Bates also has an article in the recent edition of R News showing how to perform matrix operations for least squares. -----Original Message----- From: r-help-bounces at stat.math.ethz.ch [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Pierre-Olivier Chasset Sent: Tuesday, February 01, 2005 1:22 PM To: r-help at stat.math.ethz.ch Subject: [R] Matrix langage Hello, I would like to use R in a laboratory. They use actually IML of the SAS-Society. With this IMLangage, you can enter a mathematical formula with sum from i to n, transpose matrix, sum of a colonne and all this stuff. After that, the software can translate it in a program. I am not currently use R in Matrix langage. But I manipulate data frame. I have the feeling that R can do like SAS do. What do you think about it? Thanks in advance, Pierre-Olivier Chasset ______________________________________________ R-help at 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
Matrix manipulations are a strength of R. If A and B are
matrices, (A+B) adds them and (A %*% B) is the usual matrix
multiplication; A*B is elementwise multiplication. qr(A) = the Q-R
decomposition; svd(A) = singular value decomposition. eigen(A) =
eigenvalue-eigenvector decomposition (except if you need some special
Jordon form with repeated roots).
Have you looked at ch. 5 in "An Introduction to R" under
"www.r-project.org" -> Documentation: Manuals.
hope this helps.
spencer graves
Pierre-Olivier Chasset wrote:
> Hello,
>
> I would like to use R in a laboratory. They use actually IML of the
> SAS-Society. With this IMLangage, you can enter a mathematical formula
> with sum from i to n, transpose matrix, sum of a colonne and all this
> stuff. After that, the software can translate it in a program.
> I am not currently use R in Matrix langage. But I manipulate data
> frame. I have the feeling that R can do like SAS do.
> What do you think about it?
> Thanks in advance,
>
> Pierre-Olivier Chasset
>
> ______________________________________________
> R-help at 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