Numerical Methods Calculator

PNMuSI Course - Numerical Approximation and Interpolation

Least squares methods for fitting curves to data points. Includes linear, quadratic, polynomial, power, and exponential approximations.

Construct polynomials that pass through all data points. Includes Lagrange, Newton, and direct methods.

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Quick Reference

Least Squares

minimize: S = Σ(yˇ˙ - P(xˇ˙))²

Lagrange Basis

Lₖ(x) = Π(i≠k) (x-xᵢ)/(xₖ-xᵢ)