mxGetPr inside mexFunction returning null
2 visualizaciones (últimos 30 días)
Mostrar comentarios más antiguos
i have a mexFunction() which i compile under visual studio.
inside the mexFunction() i have sometthing like
double *a = mxGetPr(nrhs[1]);
the complilation is fine and in the debug mode i am able to enter the mexFunction and stop at the "double *a" line but i get null for "a".
i am unable to figure out what the problem may be. For a different program similar procedures work.
0 comentarios
Respuestas (1)
Jan
el 20 de Jul. de 2013
Editada: Jan
el 21 de Jul. de 2013
"I have something like" is not sufficient for a question. Obviously there is a problem with the specific code, therefore posting something similar cannot help to find the bug.
mxGetPr(prhs[1]) works correctly, whenever the function was called with at least 2 inputs and the 2nd one is a double array. Is this the case?
[EDITED] James saw, that "nrhs" is wrong here and "prhs" must be meant.
3 comentarios
James Tursa
el 21 de Jul. de 2013
I am assuming that nrhs[1] is a typo and should be prhs[1] ... true? And as Jan has already said, please post your code instead of making us guess with your code snippets. Also post how you are calling the function from the m-file level.
Jan
el 21 de Jul. de 2013
@James: Oh. I've overseen the obviously confused "nrhs" and "prhs". It was almost midnight and one of the hottest nights we can have in central Europe.
Ver también
Categorías
Más información sobre Resizing and Reshaping Matrices en Help Center y File Exchange.
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!