| Syntax: |
vout = INTERPOLATE(x,y,xout,'LAGRANGE')
|
If the LAGRANGE keyword is used, the
interpolating method used is general Lagrange interpolation. The degree of
the interpolating polynomial depends on the number of input data points.
Suppose that N is the number of points, equal to the lengths of
x and y. If N = 2,
then a simple straight line is used for interpolating. If N = 3
or N = 4, then a quadratic is used. If N ≥ 5,
then a polynomial of degree 4 is used for the interpolation.