I want to load sever flies and save them to individual variables not located in a single structure or cell.

I have several CSV files that I want to import into my workspace each named to a different variable. For example I have Scenario1.csv through Scenarion32.csv. I want so save to variables a1 though a32. all individually saved and not located in a single structure or cell. I would like to do this in a for loop. This is what I have tried.

d = dir('*.csv');                
Number_mat = length(d);       
for i=1:32  
    a(i).data= readtable(['Scenario' num2str(i) '.csv']);
end

[Stephen23]

Rather than creating a second structure array and inefficiently expanding it on each loop iteration, it is better and more efficient to store the data in the structure array that you already have:

D = 'path to the directory where the files are saved';
S = dir(fullfile(D,'*.csv'));                
N = numel(S);       
for k = 1:N
    F = fullfile(D,S(k).name);
    S(k).data = readtable(F);
end

https://www.mathworks.com/help/matlab/matlab_prog/access-multiple-elements-of-a-nonscalar-struct-array.html

Why do you use dir to get a list of the filenames, which you then do not use?

Why do you use length (tip: better to use numel) to count the number of files, which you also do not use?

"..and not located in a single structure or cell."

Why?

Answer 1

[madhan ravi]

Here's why you shouldn't!!

https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval

d = dir('*.csv');                
n = numel(d);       
a = cell(n, 1);
for k = 1 : n  
    a{k} = readtable(sprintf('Scenario%d.csv', k));
end

[JC]

How can I acess these variables once they are loaded. I need to use the collumns and rows for other calculations and plots.

[madhan ravi]

A = [ a{ : } ]

[JC]

So I need to also create X variables for the first column in in each table. So I would like X1 through X32

[Stephen23]

"How can I acess these variables once they are loaded."

Using basic indexing:

https://www.mathworks.com/help/matlab/matlab_prog/access-data-in-a-cell-array.html

"So I need to also create X variables for the first column in in each table. So I would like X1 through X32"

I don't see why you "need" to do that. So far everything you have described could be done much more simply and more efficiently using basic indexing. Have you tried using indexing?