"Steven_Lord" <firstname.lastname@example.org> wrote in message <email@example.com>... > > > "kinor " <firstname.lastname@example.org> wrote in message > news:email@example.com... > > Edric M Ellis <firstname.lastname@example.org> wrote in message > > <email@example.com>... > >> "kinor " <firstname.lastname@example.org> writes: > > *snip* > > > I looked in the help of rank, its multithreading is not mentioned there, > > where did you know that? > > Technically the RANK function itself is not multithreaded, as it is a MATLAB > function file and it doesn't use any of the parallel constructs like PARFOR > or SPMD from Parallel Computing Toolbox. > > However, most of the time required to compute RANK is used by computation of > the singular values of the input matrix using SVD, and SVD _is_ > multithreaded (under certain conditions, notably when the data is large > enough.) > > http://www.mathworks.com/support/solutions/en/data/1-4PG4AN/index.html?solution=1-4PG4AN > > I'd say that's close enough to count Edric's statement as correct. > > -- > Steve Lord > email@example.com > To contact Technical Support use the Contact Us link on > http://www.mathworks.com
thanks a lot for the enlighting comment, I did not doubt Erics comment. I was just surprised. thanks again Eric.
best regards kinor
any idea why the last example i posted is not faster with parfor?