Mercurial > hg > smallbox

diff Problems/private/sprow.m @ 15:51b76c31c93d

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
(none)
author idamnjanovic
date Thu, 25 Mar 2010 14:05:27 +0000
parents
children
line wrap: on
line diff
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Problems/private/sprow.m	Thu Mar 25 14:05:27 2010 +0000
@@ -0,0 +1,19 @@
+%SPROW Extract row of sparse matrix.
+%  X = SPROW(A,J) where A is a sparse matrix, returns the nonzero values in
+%  the row A(J,:).
+%
+%  [X,ID] = SPROW(A,J) also returns the column indices of the nonzeros.
+%
+%  Note that the call [X,ID] = SPROW(A,J) is equivalent (but more efficient
+%  than) the Matlab code
+%
+%    IDS = find(A(J,:)); 
+%    X = A(J,IDS);
+
+
+%  Ron Rubinstein
+%  Computer Science Department
+%  Technion, Haifa 32000 Israel
+%  ronrubin@cs
+%
+%  August 2009