Sampling the LDPC code by MATLAB

Hay all, actually I am working on a code that requires correcting errors, and I chose LDPC because it's common and more accurate.Also, I read a lot about it but it still foggy. So I am asking if there is any way or for example sample code for LDPC to know how this code works. By the way, I got some simulations and kits to run this code but my question to understand how this code run and how we can use or insert it into main code.

Thank you for reading and either answer it or not

Abe