[R] help generalizing the following non-symmetric "identity"-like matrix

[William Dunlap]

> p <- 5
> k <- 3
> identical(cbind(diag(3), c(0, 0, 0), c(0, 0, 0)), diag(nrow=k, ncol=p))
[1] TRUE

Look at help(diag).

Bill Dunlap
Spotfire, TIBCO Software
wdunlap tibco.com


> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On Behalf
> Of Charlie Brown
> Sent: Thursday, September 26, 2013 9:24 AM
> To: R-help
> Subject: [R] help generalizing the following non-symmetric "identity"-like matrix
> 
> Hi,
> I need help generalizing the following non-symmetric "identity"-like matrix
> In this case:
> 
> p = 5
> k=3
> 
> and I want this:
> 
> I.kp <- cbind(diag(3), c(0, 0, 0), c(0, 0, 0))
> 
> How can I generalize this so that I don't have to add/subtract c(0, 0,
> ... , 0) when p and k changes?
> 
> Hopefully that makes sense.
> Thanks.
> Chuck
> 
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