How to make two mxArray* scalar multiply each other?
3 visualizaciones (últimos 30 días)
Mostrar comentarios más antiguos
wei zhang
el 15 de Feb. de 2021
Respondida: James Tursa
el 15 de Feb. de 2021
Hi,
I have a simple step of multiplying two double scalar variables in mex. Why not the type "mxDouble" support multiply? Must I convert the mxDouble to double in c? My sample code is as below. I don't know much about the mx* type data. Thank you.
mxDouble* x = mxGetPr(prhs[0]);
mxDouble* y = mxGetPr(prhs[1]);
plhs[0] = mxCreateDoubleScalar (x*y);
% expression must have arithmetic or unscoped enum type
0 comentarios
Respuesta aceptada
James Tursa
el 15 de Feb. de 2021
x and y are pointers, so you need to dereference them to get at the double values they point to. So your code should be:
plhs[0] = mxCreateDoubleScalar (*x * *y);
0 comentarios
Más respuestas (0)
Ver también
Categorías
Más información sobre Characters and Strings 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!