Hi Ricardo,
I understand that you wish to know the size of different matrices within a loop but get the size of the matrix’s name as a string.
The “eval” function can be used to evaluate the string and thus can be used to find the size of the required matrix.
Here is a sample code snippet that could be useful:
MediaOfDay_01 = zeros(2,3);
MediaOfDay_02 = zeros(5,3);
MediaOfDay_03 = zeros(4,3);
MediaOfDay_11 = zeros(4,11);
size(eval(strcat('MediaOfDay_',sprintf('%02d',i))))
size(eval(strcat('MediaOfDay_',sprintf('%02d',i))),2)
For additional information regarding the “eval” function, please refer the following MATLAB documentation:
However, the “eval” function is not always the best solution as it can unexpectedly create or assign to a variable already to a variable in the current workspace, overwriting existing data.
The preferred way to store data is to create a cell array or structure array.
Here is sample code that could be useful:
MediaOfDay_01 = zeros(2,3);
MediaOfDay_02 = zeros(5,3);
MediaOfDay_03 = zeros(4,3);
MediaOfDay_11 = zeros(4,11);
For more information related to alternatives to the “eval” function, please refer the following MATLAB documentation:
I hope this helps.
