Please how can I store all my matrix?

Hello,

I made a for loop that imports a database (several matrix), I wanted to store all matrices on a single matrix but I can store only the last one. Please how can I store all the matrix?

for i = 1:length(find([d.isdir]==0))-1
    channel = "/channel_"+i+".dat";
    location = strcat(location_filename,channel);
    location= sprintf('% s', location);
    %import Matrix
    channel = [importdata(location)];
end
y = channel

Answer 1

[James Tursa]

Maybe use a cell array:

channel{i} = [importdata(location)];

Then at the end you can work with the individual matrices as channel{i}, or concatenate all of the channel elements into a single larger matrix.

[Inouss]

Thank you James but it does not work. here is the error message

Curly brace assignment into a string expects a character vector.

Error in importfile (line 18)

channel{i}= [importdata(location)];

[James Tursa]

Sorry, I forgot you had previously used that variable name. Simply pick another name. E.g.,

channels{i} = [importdata(location)];

You might want to pre-allocate channels prior to the loop.

[Inouss]

Thank you James it works but I would like to access these matrices and be able to draw a plot with all the data.

ps: the matrices contain 2 columns and thousands of lines