Gauss Elimination

This is one of the process of solving simultaneous linear equation by Back substitution method.

First step of this process is it's directly converts the linear simultaneous equations to matrix form.For partial pivoting you need to enter the equation manually.We can't put a equation on first place if the equation first co-efficient is zero.In this case,we need to swap between another equation.Inner loop of this code makes the required column component zero.Matrix a is the matrix of co-efficient and b is the constants.I don't really do the substitution in this code.I just use the command 'linsolve(a,b)' to find the solution of two matrix of upper triangular and constants.