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taking rows from a sparse matrix


From: Yin Zhu
Subject: taking rows from a sparse matrix
Date: Fri, 9 Apr 2010 21:59:15 +0800


Hi, There!

I know that the sparse matrix representation is based on the column representation,
the data structure stores the nonzero entries in each column.

Thus A(:,2) (taking out the second column) is efficiently implemented.

How about A(:,2), taking the second row?

Thanks very much!

Regards,

--
Yin Zhu,
Ph.D. Student
Department of Computer Science and Engineering
Hong Kong University of Science and Technology
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