How to change directory or folder in Matlab in a program?

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Hello, I wanted to know how I can change to another folder in the same directory while I program . That is, I'm in a folder called ' first' for example, that is where my .m file 'm programming , and inside that folder there is another called ' second ' in which I want to place me in the program to check for certain files or anything . How could I?
In short , to have something like this:
function [ ] = main ( ) % that is in the main folder or directory % This program would other lines .
% And then go to the folder ' second '
if exist ( .wav file ) ~ = 2 % Within that folder to see if there is , then go back to the source folder .
Thanks in advanced!
  1 Comment
Stephen23 on 6 Jul 2016
Edited: Stephen23 on 6 Jul 2016
It is possible to change folders, but doing this is slow and makes debugging difficult, and it is usually a bad way to write code. It is much faster and more reliable to simply pass the path information along with the file name. See Azzi Abdelmalek's answer for an example of this.

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Accepted Answer

Azzi Abdelmalek
Azzi Abdelmalek on 6 Jul 2016

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