[R] diag() problem

[Ravi Varadhan]

It has to do with the "NA"s in dimnames, but I don't know why this is a
problem.  If you either got rid of dimnames or assigned actual names, this
works fine.

Ravi.

> -----Original Message-----
> From: r-help-bounces at stat.math.ethz.ch [mailto:r-help-
> bounces at stat.math.ethz.ch] On Behalf Of Robin Hankin
> Sent: Wednesday, October 19, 2005 10:55 AM
> To: RHelp
> Subject: [R] diag() problem
> 
> Hi
> 
> I have a matrix "u", for which diag() gives an error:
> 
> u <- structure(c(5.42334674128216, -2.31319389204264, -5.83059042218476,
>   -1.64112369640695, -2.31319389212801, 3.22737617646609,
> 1.85200668021569,
>   -0.57102273078531, -5.83059042231881, 1.85200668008156,
> 11.9488923894962,
>   -3.5525537165941, -1.64112369587405, -0.571022730886046,
> -3.55255371755604,
>   10.0989829379577), .Dim = c(4, 4), .Dimnames = list(c("constant",
>   NA, NA, NA), c("constant", NA, NA, NA)))
> 
>  > u
>            constant       <NA>      <NA>       <NA>
> constant  5.423347 -2.3131939 -5.830590 -1.6411237
> <NA>     -2.313194  3.2273762  1.852007 -0.5710227
> <NA>     -5.830590  1.8520067 11.948892 -3.5525537
> <NA>     -1.641124 -0.5710227 -3.552554 10.0989829
>  > is.matrix(u)
> [1] TRUE
>  > diag(u)
> Error in if (is.list(nms) && !any(sapply(nms, is.null)) && all((nm <-
> nms[[1]][1:m]) ==  :
>      missing value where TRUE/FALSE needed
> 
>  >
> 
> 
> What's going on here?
> 
> 
> 
> 
>  > R.version
>           _
> platform powerpc-apple-darwin8.2.0
> arch     powerpc
> os       darwin8.2.0
> system   powerpc, darwin8.2.0
> status
> major    2
> minor    2.0
> year     2005
> month    10
> day      06
> svn rev  35749
> language R
>  >
> 
> 
> 
> 
> --
> Robin Hankin
> Uncertainty Analyst
> National Oceanography Centre, Southampton
> European Way, Southampton SO14 3ZH, UK
>   tel  023-8059-7743
> 
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