Lagrange's Polynomial Interpolation

Interpolates a scalar or vector yp = f(xp) with given x and y = f(x) vectors and xp query


Updated 13 Jun 2021

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Lagrange's Polynomial Interpolation based on weighted factors or Lagrange polynomials with sum = 1.
Example data:
x = [1 4 6 5]; % x vector
y = log(x); % y = f(x) vector
xp = 2 or xp = [2 3]; % x point(s) (scalar or vector) query
yp = Lagrangeinterp(x,y,xp)
to calculate
yp = f(x point) point(s) (scalar or vector)
[~,L] = Lagrangeinterp(x,y,xp)
to output the Lagrange polynomial cell array

Cite As

Roche de Guzman (2023). Lagrange's Polynomial Interpolation (, MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2021a
Compatible with any release
Platform Compatibility
Windows macOS Linux

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