Figure Properties - SERC

interp1
For the 'spline' method, interp1 calls a function spline that uses the
functions ppval, mkpp, and unmkpp. These routines form a small suite of
functions for working with piecewise polynomials. spline uses them to perform
the cubic spline interpolation. For access to more advanced features, see the
spline reference page, the M-file help for these functions, and the Spline
Toolbox.
For the 'pchip' and 'cubic' methods, interp1 calls a function pchip that
performs piecewise cubic interpolation within the vectors x and y. This method
preserves monotonicity and the shape of the data. See the pchip reference page
for more information.
See Also interpft, interp2, interp3, interpn, pchip, spline
References [1] de Boor, C., A Practical Guide to Splines, Springer-Verlag, 1978.
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