MATLAB: How to limit the maxmimum number of files to be loaded from a database

fileload

Suppose I have a database of 200k files (.mat files) but I want to randomly open only 15000 files out of those 200k. Is there a way to do that? Thanks in advance..

Best Answer

You could use dir() to get the names of all *.mat files, and then use randperm() to randomly choose 15000 of them. Something like this:
matFiles = dir('*.mat');   %get all mat files
n = randperm(200e3);      %generate numbers between 1 and 200k in random order
n = n(1:15e3);            %get first 15k numbers
matFiles = matFiles(n);    %this will have 15k mat files, randomly chosen.
Related Question