Learn more about Spline Toolbox

Using the Spline Fits

If f is one of these splines cs, ch, or sp so constructed, then, as we saw already, it can be displayed by the statement

fnplt(f) 

Its value at a is given by the statement

fnval(f,a);

Its second derivative is constructed by the statement

DDf = fnder(fnder(f));

or by the statement

DDf = fnder(f,2);

Its definite integral over the interval [a..b] is supplied by the statement

diff(fnval(fnint(f),[a;b]));

and the difference between the spline in cs and the one in ch can be computed as

fncmb(cs,'-',sp);

Least Squares

Vector-Valued Functions

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