How can I load variable mat file with similar name, modify them and save them again?

for i=1:num    
    v = sprintf('Following_%d',i);
    l = heigth(v)
end

*I want to read the size of the table, load a column of that specific table, find values equal to 0 and save it again. The same process with multiple tables.

[Rik]

So you have some variables stored in a mat file and you want to find their sizes? Why don't you load into a struct (which you should do anyway) and loop over the fields?

And avoid numbered variables. They are a bad idea if you are going to generate variable names at runtime.

Answer 1

[Walter Roberson]

filename = 'AppropriateFileNameGoesHere.mat';
ds = load(filename);

for i=1:num    
    fn = sprintf('Following_%d',i);
    v = ds.(fn);
    l = height(v);
    c = v{:,appropriate_column_index};
    idx = find(c == 0);
    something something something
    ds.(fn) = changed v;
end

save(filename, '-struct', ds)