matrix indexing in 'for' loop?
On Wed, Dec 22, 2010 at 6:39 PM, <govindas at msu.edu> wrote:
Thank you both for your suggestions. I have another question - is there a specific way to access the individual elements of a 'list' variable? i.e. dmi = matrix(rnorm(20),4,5) soi = matrix(rnorm(20),4,5) pe = matrix(rnorm(20),4,5) y <- list(dmi, soi, pe) y[[1]]?? gives [,1]?????? [,2]?????? [,3]?????? [,4]?????? [,5] [1,] -0.54463900? 1.6732445 -0.3807847 -1.0460530 -0.8142748 [2,] -0.49654004 -0.9634258? 0.9074139 -0.1576030 -1.2268558 [3,] -1.61835766 -0.4240122? 0.3626670? 0.7182964? 0.1576446 [4,] -0.06313983? 0.6743465 -1.9897107? 0.8027337 -1.4372131 But, I am interested in accessing the 1st column of 'dmi' matrix here - not as dmi[,1] but in terms of 'y'. Is it possible with 'list' function or something else?
Is this what you need?
y[[1]]
[,1] [,2] [,3] [,4] [,5] [1,] 0.2523449 -1.26606999 0.27594223 -0.5158524 -0.599899 [2,] -1.9155409 0.01081565 0.44497873 0.1819517 1.187899 [3,] 0.7624774 0.31296468 -0.02187076 0.9389091 0.865527 [4,] -0.8082626 -1.44330148 1.32975075 0.1788399 1.204917
y[[1]][,1]
[1] 0.2523449 -1.9155409 0.7624774 -0.8082626 Liviu