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[Help-glpk] Zero valued coefficients
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From: |
Heinrich Schuchardt |
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Subject: |
[Help-glpk] Zero valued coefficients |
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Date: |
Tue, 25 Aug 2015 19:37:44 +0200 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Icedove/31.8.0 |
Hello Andrew,
currently
glp_set_mat_col()
glp_set_mat_row()
glp_load_matrix()
may be used to place zero valued coefficients in the sparse matrix
stored as structure GLPAIJ.
These zero values are not needed in any way by GLPK.
It is left to the calling problem to avoid passing zeros.
I suggest to change above functions to check the value of coefficients
and to simply ignore any zero values.
A simple
if (0 == val[k])
continue;
will be sufficient.
Best regards
Heinrich Schuchardt
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