ppval

Evaluate a piecewise polynomial form

📝Syntax

vq = ppval(pp, xq)

📥Input Arguments

Parameter	Description
pp	Piecewise polynomial structure, such as the structure returned by interp1(..., 'pp').
xq	Query points.

📤Output Arguments

Parameter	Description
vq	Values of the piecewise polynomial at xq.

📄Description

ppval evaluates a piecewise polynomial structure. The structure contains breaks, coefficients, number of pieces, order, and output dimension.

For the interpolation workflow, create pp with interp1(x, v, method, 'pp'), then evaluate it repeatedly with ppval.

💡Examples

x = 1:4;
v = [10 20 40 80];
pp = interp1(x, v, 'linear', 'pp');
ppval(pp, [1.5 2.5])

🔗See Also