Exporting matrices from function to cell array

Hello all,

So I am trying to process some images. The function reads the image and stores it internally in a variable called avg ( as a matrix). And since this is happening inside the function I can not access tha variable avg.

So I did a little research and found assigin() function. However, I have tried to store these matrices in a cell array that I have opened in the testFunction file, which is not the function file ( I just call the function from this file), but the cell array remains empty.

This is my empty cell array function

CesarelliFlt_img = {};

This is my assignin() function

assignin('base','CesarelliFlt_img',avg);

Yes I know that this will only store the last value since there is no for loop. So I did this

assignin('base',CesarelliFlt_img{k},avg);

This now returns a CesarelliFlt_img cell file with 0X0 .

k is my for loop variable in that the filter function uses to go through the images.

What might seem to be the problem? I feel I am not using assignin right , specially the variable name section.

Thanks in advance.

[Mathieu NOE]

hello

why not simply make the variable avg accessible as one output argument of the function ?

[Stephen23]

"And since this is happening inside the function I can not access tha variable avg."

Sure you can: a simple output argument lets you do that, much simpler and more efficient than your approach.

Answer 1

[Jan]

Using assignin suffers from the same problems as eval. See https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval

Use an output argument to provide variables to the caller.