[R] print points from a huge matrix

[Bing Zhang]

Hi All,

I have a 8000*8000 matrix and I want to print out a file with the row name, 
column name and the value for those point with values satisfying a condition. 
I tried using a for loop, however, it took me forever to get the result. Is 
there a fast way to do this? Thanks!

Bing

---------------------------------
1060 Commerce Park
Oak Ridge National Laboratory
P.O. Box 2008, MS 6480
Oak Ridge, TN 37831-6480
Phone: 865-241-0761
Email: zhangb at ornl.gov