dynare/dynare++/sylv/testing/tr5x5.mm

%%MatrixMarket matrix array real general
5 5
 2
 0
 0
 0
 0
 3
-3
 0
 0
 0
 5
 2
 6
 0
 0
-1
 4
-8
 1
 0
 0
 1
 2
 1
 3