MATLAB: How to run 4 loops simutaneously

parallel computing

In my code there are 4 matrix to fill. So there are 4 "for…end". They are independent by each other. Now I want to do some acceleration. How to run there 4 loops simultaneously?

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If you have the Parallel Computing Toolbox, there is "parfor" and "spmd" and distributed arrays.

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MATLAB: How to use multiple USB webcam in Matlab working simutaneously

This is not a bandwidth problem, since a camera that is detected but not in active use consumes (almost) no bandwidth.

There is also no USB limitation about having multiple cameras on the same bus.

There are potential difficulties about getting acceptable frame rates when the two cameras are on the same USB bus.

I do not know why only one of the cameras would be detected. Which MATLAB version are you using?

MATLAB: Sub values into multiple rows and columns simutaneously

Replacing 3 elements is not time consuming and the show code is very efficient. If run time is critical, you are working on another problem, obviously. Then it is better to explain the real problem, and not a very simplified version of it, which omits the actual time consuming details.

If you want to replace some thousands of elements, whose indices are store in two vectors:

x = [1,2,3];  % Can be much longer
y = [1,2,3];
index    = sub2ind(size(A), x, y);
A(index) = -4;

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MATLAB: How to use multiple USB webcam in Matlab working simutaneously

MATLAB: Sub values into multiple rows and columns simutaneously

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