R help - Oct 2010 - replaces a matrix of "NA"s in an array with the previous matrix with numbers

Dear list,

Does anyone know if there is a function that replaces a matrix of
"NA"s in
an array with the previous matrix with numbers?  For example, I have an
array

ab <- array(dim=c(3,3,15),dimnames=list(rows=1:3,cols=1:3,dim=times)) .

Select out put from the array is:

, , dim = 0.478356969557745
    cols
rows         1 2         3
   1 0.4921053 0 0.5078947
   2 0.0000000 0 1.0000000
   3 0.0000000 0 1.0000000

, , dim = 0.525800177828904
    cols
rows  1  2  3
   1 NA NA NA
   2 NA NA NA
   3 NA NA NA

, , dim = 0.60831082579661
    cols
rows  1  2  3
   1 NA NA NA
   2 NA NA NA
   3 NA NA NA

I would like to replace the last two matrices in the array with the matrix
from a[,,dim = 0.478356969557745] so that the output looks like this:

, , dim = 0.478356969557745
    cols
rows         1 2         3
   1 0.4921053 0 0.5078947
   2 0.0000000 0 1.0000000
   3 0.0000000 0 1.0000000

, , dim = 0.525800177828904
     cols
rows         1 2         3
   1 0.4921053 0 0.5078947
   2 0.0000000 0 1.0000000
   3 0.0000000 0 1.0000000

, , dim = 0.60831082579661
    cols
rows         1 2         3
   1 0.4921053 0 0.5078947
   2 0.0000000 0 1.0000000
   3 0.0000000 0 1.0000000

Any help would be greatly appreciated!

Thanks!

Nicole

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Try this:

ab <- array(rnorm(3*3), dim = c(3,3,3))
ab[,,-1] <- NA
ab[ , ,tail(seq(dim(ab)[3]), 2)] <- ab[, , 1]

On Wed, Oct 6, 2010 at 12:49 PM, Farida Mostajabi
<faridamsb@gmail.com>wrote:
> Dear list,
>
> Does anyone know if there is a function that replaces a matrix of
"NA"s in
> an array with the previous matrix with numbers?  For example, I have an
> array
>
> ab <- array(dim=c(3,3,15),dimnames=list(rows=1:3,cols=1:3,dim=times)) .
>
> Select out put from the array is:
>
> , , dim = 0.478356969557745
>    cols
> rows         1 2         3
>   1 0.4921053 0 0.5078947
>   2 0.0000000 0 1.0000000
>   3 0.0000000 0 1.0000000
>
> , , dim = 0.525800177828904
>    cols
> rows  1  2  3
>   1 NA NA NA
>   2 NA NA NA
>   3 NA NA NA
>
> , , dim = 0.60831082579661
>    cols
> rows  1  2  3
>   1 NA NA NA
>   2 NA NA NA
>   3 NA NA NA
>
> I would like to replace the last two matrices in the array with the matrix
> from a[,,dim = 0.478356969557745] so that the output looks like this:
>
> , , dim = 0.478356969557745
>    cols
> rows         1 2         3
>   1 0.4921053 0 0.5078947
>   2 0.0000000 0 1.0000000
>   3 0.0000000 0 1.0000000
>
> , , dim = 0.525800177828904
>     cols
> rows         1 2         3
>   1 0.4921053 0 0.5078947
>   2 0.0000000 0 1.0000000
>   3 0.0000000 0 1.0000000
>
> , , dim = 0.60831082579661
>    cols
> rows         1 2         3
>   1 0.4921053 0 0.5078947
>   2 0.0000000 0 1.0000000
>   3 0.0000000 0 1.0000000
>
> Any help would be greatly appreciated!
>
> Thanks!
>
> Nicole
>
>        [[alternative HTML version deleted]]
>
> ______________________________________________
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> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> 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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