Hi i am Dimitrios Gerontitis i have already written a function for a matrix A which i use to a system Ax=b where x is the unknown vector which inludes Fourier Coefficients. So i want to ask how i can fix my code to take my resuts faster

EDIT: code attached as a file.

[Stephen23]

"So i want to ask how i can fix my code to take my resuts faster"

You provided us with more than one hundred lines of code, many lines of which are more than 200 columns wide, and the whole code contains nearly 12,000 characters. The point is that it is not exactly simple code, and there are probably multiple ways that you could improve your code.

So you should learn how to write efficient code:

https://www.mathworks.com/help/matlab/matlab_prog/techniques-for-improving-performance.html

Judging by a quick overview, you definitely need to learn about preallocation and vectorization:

https://www.mathworks.com/help/matlab/matlab_prog/preallocating-arrays.html

https://www.mathworks.com/help/matlab/matlab_prog/vectorization.html

Answer 1

[madhan ravi]

Read about preallocation

[Dimitrios Gerontitis]

Can you help because i cannot understand how i can do my function runfaster with preallocation?My code is right.Exists any book or youtube video to see how it works?

[madhan ravi]

Read the link in my answer also see videos in YouTube for https://m.youtube.com/watch?v=D9t6c5XS6MY

[Dimitrios Gerontitis]

Do you have any email?