Hey Alexi,
I understand that you are facing the following error: "The entire array or structure Y-temp is broadcast variable. This might result in unneccesary comunicaiton overhead" through your above code snippet.
- The broadcast variable is a variable that does not change inside a loop. At the start of a parfor loop, MATLAB sends the values of any broadcast variables to all the workers. The usage of large/many broadcast variables can cause significant communication between a client and its associated workers, and in turn increases overhead. You can learn more about these variables by going through the following documentation: https://www.mathworks.com/help/parallel-computing/broadcast-variable.html
- This issue arises when the loop body accesses multiple rows and columns of a matrix using the loop variable. Refer to this MATLAB Answer for more clarity upon when this issue is encountered: https://www.mathworks.com/matlabcentral/answers/419074-parfor-loop-the-entire-array-or-structure-h-is-a-broadcast-variable-this-might-result-in-unnecess
- Please note that this is a warning and not an error. There are a few ways through which you can reduce the communication overhead such as creating temporary variables within the loop body. Have a look at this MATLAB Answer which demonstrates a way to resolve the issue: https://www.mathworks.com/matlabcentral/answers/1700170-parfor-unnecessary-communication-overhead
I hope this helps!
