About SVD running time in Matlab and in C code which produced by Matlab coder.
3 visualizaciones (últimos 30 días)
Mostrar comentarios más antiguos
WillandSmith
el 13 de Ag. de 2015
Comentada: WillandSmith
el 14 de Ag. de 2015
I use SVD like code below [U,S,V] = svd(PhiG,'econ'); which PhiG is double complex matrix with dimension 60*1024. In matlab code ,the SVD running time is about 0.04 second. However ,after I compile the matlab code to C code using matlab coder.The svd running time is about 4.0+s,which is about 100 times compared to the running time in Matlab code. I have noticed that the Matlab using lapack code to calculate SVD. So the difference in running time due to Fortran code beneath Matlab code? Or is there any other reason? And how can I improve the running time in C code? Thanks a lot for any feedback.
0 comentarios
Respuesta aceptada
Walter Roberson
el 13 de Ag. de 2015
If you can use C++ then perhaps http://math.nist.gov/tnt/jama_doxygen/class_JAMA__SVD.html or something in http://lapackpp.sourceforge.net/
Your options are going to depend upon your target platform. For example if you are aiming at MS Windows then you may be able to call upon https://en.wikipedia.org/wiki/Math_Kernel_Library
3 comentarios
Walter Roberson
el 13 de Ag. de 2015
Relevant information that I dug up a couple of months ago from a different context, about what is available for ARM: http://www.mathworks.com/matlabcentral/answers/122248#answer_179228
Más respuestas (0)
Ver también
Categorías
Más información sobre Eigenvalues 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!