Create NewtonRaphsonMethod.py

ArithmeticAnalysis/NewtonRaphsonMethod.py

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+# Implementing Newton Raphson method in python
+# Author: Haseeb
+
+from sympy import diff
+from decimal import Decimal
+from math import sin, cos, exp
+
+def NewtonRaphson(func, a):
+    ''' Finds root from the point 'a' onwards by Newton-Raphson method '''
+    while True:
+        x = a
+        c = Decimal(a) - ( Decimal(eval(func)) / Decimal(eval(str(diff(func)))) )
+
+        x = c
+        a = c
+        # This number dictates the accuracy of the answer
+        if  abs(eval(func)) < 10**-15:
+            return  c
+
+
+# Let's Execute
+if __name__ == '__main__':
+    # Find root of trignometric fucntion
+    # Find value of  pi
+    print ('sin(x) = 0', NewtonRaphson('sin(x)', 2))
+
+    # Find root of polynomial
+    print ('x**2 - 5*x +2 = 0', NewtonRaphson('x**2 - 5*x +2', 0.4))
+
+    # Find Square Root of 5
+    print ('x**2 - 5 = 0', NewtonRaphson('x**2 - 5', 0.1))
+
+    #  Exponential Roots
+    print ('exp(x) - 1 = 0', NewtonRaphson('exp(x) - 1', 0))
+
+
+
+