mxGetPr inside mexFunction returning null
1 回表示 (過去 30 日間)
古いコメントを表示
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 件のコメント
回答 (1 件)
Jan
2013 年 7 月 20 日
編集済み: Jan
2013 年 7 月 21 日
"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 件のコメント
James Tursa
2013 年 7 月 21 日
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
2013 年 7 月 21 日
@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.
参考
カテゴリ
Help Center および File Exchange で Resizing and Reshaping Matrices についてさらに検索
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!