Removing NAs from matrix

Hi,
Try:
?rowMeans

rowMeans(mat,na.rm=TRUE)
A.K.

Hello R users,

I'm new to R so apologies if this question seems simple. I have a matrix which is 35000 columns by 35000 rows and I?m wanting to work out the mean of each row. I've tried using the code below on a smaller version of the matrix, but receive an error:

mat

????? [,1]????? [,2] [,3]????? [,4]?????? [,5]????? [,6]????? [,7]????? [,8]????? [,9]???? [,10]???? [,11]
?[1,]?? NA 0.3904762? 0.2 0.4285714 0.04761905??????? NA??????? NA??????? NA??????? NA??????? NA??????? NA
?[2,]?? NA??????? NA? 0.2 0.2000000 0.23809524 0.2190476??????? NA??????? NA??????? NA??????? NA??????? NA
?[3,]?? NA??????? NA?? NA 0.5047619 0.27619048 0.2952381 0.1428571??????? NA??????? NA??????? NA??????? NA
?[4,]?? NA??????? NA?? NA??????? NA 0.42857143 0.3714286 0.3333333 0.2190476??????? NA??????? NA??????? NA
?[5,]?? NA??????? NA?? NA??????? NA???????? NA 0.8666667 0.6761905 0.4857143 0.6571429??????? NA??????? NA
?[6,]?? NA??????? NA?? NA??????? NA???????? NA??????? NA 0.6190476 0.4285714 0.6761905 0.4857143??????? NA
?[7,]?? NA??????? NA?? NA??????? NA???????? NA??????? NA??????? NA 0.6952381 0.6380952 0.6000000 0.2571429
?[8,]?? NA??????? NA?? NA??????? NA???????? NA??????? NA??????? NA??????? NA 0.6761905 0.6000000 0.1809524
?[9,]?? NA??????? NA?? NA??????? NA???????? NA??????? NA??????? NA??????? NA??????? NA 0.6190476 0.3142857
[10,]?? NA??????? NA?? NA??????? NA???????? NA??????? NA??????? NA??????? NA??????? NA??????? NA 0.5809524
[11,]?? NA??????? NA?? NA??????? NA???????? NA??????? NA??????? NA??????? NA??????? NA??????? NA??????? NA

mean.matrix <- matrix(ncol=1, nrow=10)
for (i in mat)

+ mean.matrix[,i] <- apply(mat,1,mean)
Error: NAs are not allowed in subscripted assignments

I have come across the na.omit() function however this completely removes the row. Is there any way I can either remove all the NAs from the matrix or pull out the values of each row to work out the mean? 

Thanks,

Amie ??? ???  ??? ?  ??? ??? ? 
______________________________________________
R-help at r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.