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Re: Speed up fairly short code
Posted:
Jul 17, 2013 9:46 AM


"Eric Sampson" <ericDOTsampson@gmail.com> wrote in message news:ks3omh$iqc$1@newscl01ah.mathworks.com... > "Steven_Lord" <slord@mathworks.com> wrote in message > <ks3jql$4jb$1@newscl01ah.mathworks.com>... >> >> >> "Kobye " <kobye.bodjona@gmail.com> wrote in message >> news:ks1luv$i3h$1@newscl01ah.mathworks.com... >> > I have a code (script) of 462 lines. In parts, it uses the symbolic >> > toolbox. It also makes calls to 3 other functions that I have written, >> > that are already highly efficient. >> > >> > The code is a mechanical model (theory of elasticity) that describes >> > two plates joined by adhesive. The model is very elegant in its >> > formulation, but currently it is way too slow. I have the option of >> > either discarding it, or massively speeding it up. I have reason to >> > believe that large speed increases are feasible (similar models exist >> > and have been used for sensitivity analyses in the literature). >> > >> > If anyone would like to help me find ways to speed it up, your help >> > would be immeasurably appreciated. I will send you the code privately >> > as I don't necessarily want it in the public domain. >> > >> > Kobye >> > >> > PS the main bottlenecks seem to be symbolic integrations of my >> > Bernstein basis polynomials. I think that maybe the code could be sped >> > up here by using the Matlab poly options, but I am totally unfamiliar >> > with these. >> >> Try converting that symbolic integration into numeric integration using >> matlabFunction, FEVAL, or EVALIN (as shown in the Tips section of the >> documentation page below) and INTEGRAL. >> >> http://www.mathworks.com/help/symbolic/matlabfunction.html >> >>  >> Steve Lord > > Steve, do you think this type of situation could be detected by Mlint and > highlighted in the Editor?
It might be detectable, but I don't think it should be reported. In some cases, you actually want to perform the symbolic integration; in this case, I think numeric integration would be sufficient for the OP's situation.
 Steve Lord slord@mathworks.com To contact Technical Support use the Contact Us link on http://www.mathworks.com



