Importing multiple files using a loop

Question

tjerk Verweij 2023-9-28

回答： Image Analyst 2023-9-28

Hello, i need to import multiple files and instead of writing them all down, i want to use a for loop for it.

These are the file names that i need to import, with 1 changing number in the file names.

A1=importdata('012_2023ef400t.txt');

A2=importdata('013_2023ef400t.txt');

A3=importdata('014_2023ef400t.txt');

this is the beginning, but i need to import 30 files.

Any suggestions?

Thank you!

Stephen23 2023-9-28

Answer 1

Dyuman Joshi 2023-9-28

编辑：Dyuman Joshi 2023-9-28

This is a general idea -

n=30;
%Preallocate
A = cell(1,n);
%Storing data
for k=1:n
    A{k} = importdata(sprintf('0%d_2023ef400t.txt', k+11));
end

Use indices to access the data in the stored array.

Depending upon the data you have, you can preallocate double or strings array instead of cell array.

I would suggest to use readmatrix or readtable instead of importdata().

tjerk Verweij 2023-9-28

thanks!

apparently i had already a way to import the data correctly, i just did not look good enough for where the data was stored.

But my for loop was quite a bit bigger, so thanks for giving me a cleaner, smaller one :)

Dyuman Joshi 2023-9-28

You are welcome!

Answer 2

Image Analyst 2023-9-28

See the FAQ document for code snippets: