[R] Error: "subscript out of bounds"

[Jagat.K.Sheth at wellsfargo.com]

Note that length(m) = 16, but your m is only 4x4.

Try this m[is.na(m)] <- 0 

-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On Behalf Of Alex99
Sent: Monday, December 01, 2008 9:06 AM
To: r-help at r-project.org
Subject: [R] Error: "subscript out of bounds"


Hi All,

I am trying to replace the "NA" values in a matrix by using the
following
function:
it gets a "name" of the matrix or list or vector and turns it to a
matrix called "m". 
then checks the elements of the matrix and if any of them is "NA"
replace them with "0".

rep=function(name){
m=as.matrix(name)
for(i in 1:length(m)){
 for(j in 1:length(m)){
  if(is.na(m[i,j])){
    m[i,j]=0
}}}}

when I use the function with the following matrix:

      X1  X2  X3    X5
X1  1.00 NA NA -0.25
X2    NA  1 NA    NA
X3    NA NA  1    NA
X5 -0.25 NA NA  1.00

I get this error: "subscript out of bounds".
I used debug on "rep" function and it seems it works for i=1 and
j=1&2&3&4&5 after that, when it's suppose to go to i=2 I get the error.
any idea why and how to fix it?
Thanks
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