How to import and evaluate multiple files in matlab?

Hello,

This code works for importing file a1.DAT. I have a1, a2 and a3 files that I want to use for my code. How do I tell matlab to load all 3 files?

This is the code to load 1 single file. Any ideas?

function DATA=INPUT_FILES_2

global DATA

fid = fopen('a1.DAT','rt');

fgetl(fid);

DATA.data = fscanf(fid,'%f',[7, Inf]);

DATA.data = DATA.data';

DATA.xte = DATA.data(1,2);

DATA.rows_remove = find(DATA.data(:,2)>DATA.xte);

if (~isempty(DATA.rows_remove))

DATA.data = DATA.data(1:DATA.rows_remove(1)-1,:);

end

end

Answer 1

[Mohammad Sami]

I am assuming all your data files have the same format. You should convert your current code into a function and call it 3 times with the different filenames. Also do not use global variable to store DATA.

% INPUT_FILES_2.m
function DATA=INPUT_FILES_2(filename)
fid = fopen(filename,'rt');
fgetl(fid);
DATA.data = fscanf(fid,'%f',[7, Inf]);
DATA.data = DATA.data';
DATA.xte = DATA.data(1,2);
DATA.rows_remove = find(DATA.data(:,2)>DATA.xte);
if (~isempty(DATA.rows_remove))
  DATA.data = DATA.data(1:DATA.rows_remove(1)-1,:);
end
end

Now you can call this in your workspace or another script / function to load the 3 files or any number of files.

DATA_A1=INPUT_FILES_2('a1.DAT');
DATA_A2=INPUT_FILES_2('a2.DAT');
DATA_A3=INPUT_FILES_2('a3.DAT');