Loading batch files in MATLAB

Question

I want load many files from a directory that their names have a pattern such as: data_1 & data_2 , ... , that as mentioned, the numbers in each "data_" are as the same with the counter of the main for loop.

How can I do this for matching the file names that are loading with the number of counter of the for loop. This is my imperfect code:

for i=1:100
loadpath='./folder/data/';
 load('Label_i.mat');
end

You can try: load(['Label_' num2str(i) '.mat']); Beside, what's the purpose of having loadpath='./folder/data/'; in each iteration if it do not change and it is not used? — il_raffa
– il_raffa, Commented May 15, 2020 at 16:04
You can use sprintf with the %i format spec:load(sprintf('Label_%i.mat', i)); — rinkert
– rinkert, Commented May 15, 2020 at 16:05
@il_raffa, Thank for your comment, I want load files from a specific path, but I think this solution does not solve that. Any ideas? — Ben25
– Ben25, Commented May 15, 2020 at 16:07
@rinkert, thanks, How can I read from the aforementioned directory? — Ben25
– Ben25, Commented May 15, 2020 at 16:08
If you want to add the path, you can either just load(sprintf('./folder/data/Label_%i.mat', i)); or use fullfile: load(fullfile(loadpath, sprintf('Label_%i.mat', i))); — rinkert
– rinkert, Commented May 15, 2020 at 16:09

rinkert · Accepted Answer · 2020-05-15 17:26:04Z

3

You can use fullfile and sprintf:

loadpath='./folder/data/';
for k = 1:100
    load(fullfile(loadpath, sprintf('Label_%i.mat', k)));
end

answered May 15, 2020 at 17:26

rinkert

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2 Comments

Ben25 Over a year ago

In the case, when the saved data in the disk, starts for example from data_125, data_126 , ..., with considering that the counter of the main loop starts from 1 to N, How the code can be adapted for this aim?

rinkert Over a year ago

Could you clarify your folder/file name structure (perhaps in the question body)? I don't understand what you are trying to do now. Just add the update at the bottom with sufficient details.

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