How can I label a solution as NaN in a MEX code?
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I am using solvers of LAPACK libraries in a MATLAB MEX file for solving linear system of equations. For some of the cases, the system that I solve is singular. For example, the system is as follows for one of my cases:
A =
0.00000000 0.00000000 0.00000000
0.00000000 0.00000000 0.00000000
0.00000000 0.00000000 77.31867171
b:
-0.00000000 -0.00000000 -0.00000000
What would be the best approach to label this solution as NaN similar to MATLAB?
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James Tursa
le 24 Juin 2014
Use the API function mxGetNaN:
E.g., to put a NaN value into a double for returning to the MATLAB workspace:
double d = mxGetNaN( );
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José-Luis
le 24 Juin 2014
if (some_condition)
some_value = 0.0/0.0; %This will produce a NaN
end
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