[R] Creating a sparse matrix from a file

Pallavi Palleti pallavip.05 at gmail.com
Mon Oct 26 10:06:36 CET 2009

Hi all,

I am new to R and learning the same. I would like to create a sparse matrix
from an existing file whose contents are in the format

for ex:

I would like to create a sparse matrix by taking the above as input.
However, I couldn't find an example where the data was being read from a
file. I tried searching in R tutorial and also searched for the same in web
but in vain. Could some one kindly help me how to give the above format as
input in R to create a sparse matrix.


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