seriessum

Sum of a power series.

Syntax

v = seriessum(x, n, m, coefficients)

Description

Returns sum_i a_i * x^(n + i*m) where a_i is the i-th element of coefficients. Useful for evaluating Taylor / Maclaurin truncations.

Examples

% Approximate exp(0.5) using 4 terms of Taylor series:
seriessum(0.5, 0, 1, [1 1 1/2 1/6])    % ≈ 1.6458

See also

• sum — Sum elements of an array.
• polyval — Evaluate a polynomial.