hi, from a rather complex data set (a huge matrix) i want to extract submatrices (of different no. of rows). i need to store those submatrices (resp. data.frames) in an array (at least something data structure i can address via an index to get the submatrices). unfortunately i have no idea how to accomplish that. thanks for any suggestions , greetinx jan -- Jan Malte Wiener Max-Planck-Institute for Biological Cybernetics Spemannstr. 38, 72076 Tuebingen, Germany Tel.: +49 7071 601 631 Email: jan.wiener at tuebingen.mpg.de -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
Jan Malte Wiener wrote:> > hi, > from a rather complex data set (a huge matrix) i want to extract > submatrices (of different no. of rows). i need to store those > submatrices (resp. data.frames) in an array (at least something data > structure i can address via an index to get the submatrices). > unfortunately i have no idea how to accomplish that. > thanks for any suggestions ,You should use a list: X <- matrix(1:100, 10) Y <- matrix(1:25, 5) L <- list(X, Y) L[[2]] # get the second list element (Y) Uwe -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
Put the matrices in a list?
a <- matrix(1:4,2)
b <- matrix(2:7,2)
l <- list(a,b)
l[[1]]
[,1] [,2]
[1,] 1 3
[2,] 2 4> l[[1]][1,2]
[1] 3
Kjetil Halvorsen
Jan Malte Wiener wrote:>
> hi,
> from a rather complex data set (a huge matrix) i want to extract
> submatrices (of different no. of rows). i need to store those
> submatrices (resp. data.frames) in an array (at least something data
> structure i can address via an index to get the submatrices).
> unfortunately i have no idea how to accomplish that.
> thanks for any suggestions ,
> greetinx jan
>
> --
> Jan Malte Wiener
> Max-Planck-Institute for Biological Cybernetics
> Spemannstr. 38, 72076 Tuebingen, Germany
> Tel.: +49 7071 601 631
> Email: jan.wiener at tuebingen.mpg.de
>
>
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> r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
> Send "info", "help", or "[un]subscribe"
> (in the "body", not the subject !) To: r-help-request at
stat.math.ethz.ch
>
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