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Python program to solve an equation using Gauss elimination

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Python program to solve an equation using Gauss elimination

''' x = gaussElimin(a,b).
    Solves [a]{b} = {x} by Gauss elimination.
'''
from numpy import dot
 
def gaussElimin(a,b):
    n = len(b)
  # Elimination Phase
    for k in range(0,n-1):
        for i in range(k+1,n):
           if a[i,k] != 0.0:
               lam = a [i,k]/a[k,k]
               a[i,k+1:n] = a[i,k+1:n] - lam*a[k,k+1:n]
               b[i] = b[i] - lam*b[k]
  # Back substitution
    for k in range(n-1,-1,-1):
        b[k] = (b[k] - dot(a[k,k+1:n],b[k+1:n]))/a[k,k]
    return b


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