Q: What is the Newton-Raphson method? A: The Newton-Raphson method is a root-finding algorithm used to find the roots of a real-valued function.
“The derivative is the problem,” Arjun whispered. He didn’t have a symbolic derivative. He had a messy Monte Carlo simulation in column G.
x_n+1 = x_n - \fracf(x_n)f'(x_n)
Copy and paste the entire block below into your VBA module:
Run the code by clicking Run > Run Sub/User Form or by pressing F5. The code will execute and display a message box with the root of the function. How To Code the Newton Raphson Method in Excel VBA.pdf
x_old = x_new Next i
He double-clicked. The PDF was short—only seven pages—but it was beautiful. Page one had a diagram: a curved function, a tangent line kissing the x-axis, and an arrow labeled xₙ₊₁ = xₙ − f(xₙ)/f’(xₙ) . Q: What is the Newton-Raphson method
The magic happened in the loop: