PCHIP 1-d monotonic cubic interpolation
x and y are arrays of values used to approximate some function f, with y = f(x). The interpolant uses monotonic cubic splines to find the value of new points.
x : ndarray
y : ndarray
axis : int, optional
Assumes x is sorted in monotonic order (e.g. x > x).
|__call__(x)||Evaluate the interpolant|
|append(xi, yi[, order])||Append a single point with derivatives to the PiecewisePolynomial|
|derivative(x[, der])||Evaluate one derivative of the polynomial at the point x|
|derivatives(x[, der])||Evaluate many derivatives of the polynomial at the point x|
|extend(xi, yi[, orders])||Extend the PiecewisePolynomial by a list of points|