Lagrange Interpolation Calculator

Polynomial through points

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About Lagrange Interpolation Calculator

A Lagrange interpolation calculator that constructs the unique polynomial of degree n−1 passing through n data points. Shows Lagrange basis polynomials Lᵢ(x), polynomial coefficients, and evaluates at any x. All calculations are client-side. Essential for numerical analysis, curve fitting, and data science.

Lagrange Interpolation Calculator Features

  • n points
  • Basis polys
  • Evaluate P(x)
  • Step-by-step
  • Add points

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