force to use cholmod

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Dohyun Kim 2016-7-22

编辑： Dohyun Kim 2016-7-22

I have theoretically symmetric sparse matrix which is not numerically symmetric.

After assemble my matrix, I have

max(max(abs(A-A')))=1.e-16

which is negligible.

However, matlab does not consider this matrix as symmetric matrix. Hence, matlab does not use CHOLMOD to solve this matrix.

Of course, I can do

A=(A+A')/2

or other thing to make A symmetric.

However, I don't want to do this because it takes quite long time to transpose and take sum.

Is there any other way to force matlab to use CHOLMOD?

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