What is the code for the Gaussian elimination

want to re-write an algorithm of the Gaussian elimination from Trefethen and David Bau. but i am struggling with the codes. actually i'm very bad in writing codes in general. so i want the code i can use and understand the procedure

[James Tursa]

What have you done so far? What specific problems are you having with your code?

http://www.mathworks.com/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer

[John D'Errico]

That you are bad at writing code just means you need to spend some time learning to write code. Or you need to find an easier class to take. Your choice.