how to omit NA without using ifelse

Hi Manli. Try the replace() function as below:
replace(a,is.na(a),0) #where a is the name of your 50 x 50 matrix

Below is an example:


a<-matrix(c(sqrt(-2:3)), nrow=2) # produces a 2 x 3 matrix some of whose
elements are NaN (or NA) 
# due to square root operator on negative integers

replace(a, is.na(a), 0) 

       [,1]  [,2]      [,3]
[1,]    0    0    1.414214
[2,]    0    1    1.732051

############################

?is.na



Manli Yan wrote:

   I have a 50*50 matrix,some entry are NAs,I want to replace these NA by
0,so can I use some syntax to do so other than using ifelse?
   I tried to use replace(a,NA,0),it didnt work~~(a is matrix name)

  Thanks~

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