Enhancing the performance of an existing Matlab program

Hello there! First, I am assuming that, whatever method is used, you want the function to remain 100% in Matlab language and not use MEX files (with C/C++ code). Otherwise, you could get very big gains in performance, at the expense of making it difficult to edit the code later (due to compilation needed etc.), Leaving this option out of the way, after having a look I can tell you that your problem is the 'for' loops. Unfortunatelly, Matlab is OK if you are doing computations with matrix/vector calculations, but is very slow if you do the work 'manually' with loops. There are ways to vectorize the code, but it improves performance for actual matrices/arrays. However, as far I can see you are using cell arrays, where each cell is a matrix. Calculations on cell arrays can still be vectorized with the 'cellfun' function, but it doesn't seem from experience to really improve performance. So, first I would look inside the functions that do work on single cells/matrices and see if they are vectorized (e.g. Q_matrix_layer). Another option one has to improve performance is to parallelize the code with 'parfor'. It is not as simple as putting a 'par' in front of a few 'for's (due to needing to 'slice' cell arrays and some other stuff), but you can get a good speedup usually. Best Regards Alex

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Hi! My name is Fernando Téllez. I am a senior year student of electrical engineering at Universidad Simón Bolívar (USB), one of the most prestigious universities in my country (Ranked 34° at the QS University Rankings: Latin America 2015). I code using matlab ON A DAILY BASIS to solve any kind of engineering, logical, statistical and mathematical problem.

hello we have MATLAB experience in medical domain. if that helps, we shall try this task. the cost estimation will be based on the code volume to be optimized and hope you will be flexible upon. our genuine request. good day.

Hi. I'm a telecom engineer and I hold also a master of science in telecommunication from centrale supelec paris. I'm quite good at matlab. Don't hesitate to contact me. Thanks in advance. Best regards.

Dear Sir, Thank you for considering me for this project. I am a Ph.D. student in Mathematics and I have hands on experience in Matlab. Let's discuss the project in detail. Looking forward to hear from you soon.

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Hello, Thanks for the invitation, I know I am little late but here is my response. I can try to optimize this code if you haven't awarded this to anyone yet. Have you checked it with matlab's tic/toc functions to check which part of the function is taking more time. Plus i would also need the file which is calling this function as without this file it would be difficult to debug this function. looking forward for your kind response. Regards, Regards,

This is not going to be easy for me; I am not gonna lie to you. That is why I am asking for the highest amount. From glancing at the code I can deduce that this is part of larger program and so one needs to have the variables to run this program. I can input random numbers to see what happens and I will do that first thing if I get the project. I will also be needing the names and the methods being used as I will then read up more on the process and simultaneously find alternatives to the program methodology. As for completion; I will try to give back an m file which delivers what you need: a faster processing time Thank you