R help - Jun 2008 - insert new columns to a matrix

Instead of prepend or append new columns to a matrix, how to insert them to a
matrix ? For example, I would like to insert 3 new columns after the 5th column
of matrix m.
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Try something like this:

m <- matrix(1:20, ncol = 5)
cbind(m[, 1:3], matrix(1:16, ncol = 4), m[,4:ncol(m)])

On Tue, Jun 24, 2008 at 8:02 AM, Daren Tan <daren76@hotmail.com> wrote:
>
> Instead of prepend or append new columns to a matrix, how to insert them to
> a matrix ? For example, I would like to insert 3 new columns after the 5th
> column of matrix m.
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>
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> ______________________________________________
> R-help@r-project.org mailing list
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> PLEASE do read the posting guide
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> and provide commented, minimal, self-contained, reproducible code.
>


-- 
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O

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just cbind the cols in the appropriate order:

m.2 = cbind( m.1[,1:5], yourthreecolumns, m.1[,6:ncol(m.1)] )

on 06/24/2008 07:02 AM Daren Tan said the following:
> Instead of prepend or append new columns to a matrix, how to insert them to
a matrix ? For example, I would like to insert 3 new columns after the 5th
column of matrix m.
> _________________________________________________________________
> [[elided Hotmail spam]]
> 
> 	[[alternative HTML version deleted]]
> 
> ______________________________________________
> R-help at 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.
>