How will I reduce the time it takes to calculate data?

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stelios loizidis 2019-7-15

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https://ww2.mathworks.cn/matlabcentral/answers/471741-how-will-i-reduce-the-time-it-takes-to-calculate-data

评论： Guillaume 2019-7-15

Hello.

In an excel file I put some data and then I creared a big matrix (1200X2000) on Matlab based on this data. Then I took this matrix and used it to calculate other data. Then I increased the number of data in excel and I made a new matrix (1500X5000). When I used this matrix to calculate what I want Matlab takes too much time. In the code I wrote I have a for loop in another and I think this is responsible for the long time it takes. What change can be made to reduce the time Matlab needs because I still have to use another big matrix (1600X8000). Your help is important.

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Adam 2019-7-15

在 MATLAB Online 中打开

Depends entirely what your calculation is. Also

doc profile

is good for understanding exactly what takes time rather than making assumptions.

Guillaume 2019-7-15

1600x8000 is not a particularly big matrix (~97 MB) but of course if you're doing calculation on each element individually it can take some time. Of course, As Adam says it all depends on the codeand whether or not it is well written, so show us that code.

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