That is, when I do A\b for a very large, symmetric and sparse A, what algorithm does matlab use?
That is, when I do A\b for a very large, symmetric and sparse A,
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That is, when I do A\b for a very large, symmetric and sparse A, what algorithm does matlab use?
The answer depends on the some properties of A (diagonal/square/banded? etc.). CHOLMOD, UMFPACK and qr factorization are some of the options.
The documentation explains it.
Here are links to online snapshots of the docs. This may be outdated.
– http://amath.colorado.edu/computing/Matlab/OldTechDocs/ref/arithmeticoperators.html
– http://www.maths.lth.se/na/courses/NUM115/NUM115-11/backslash.html