pyvib.interpolate module

pyvib.interpolate.piecewise_linear(x, y, s, delta=None, xv=[])

Interpolate piecewise segments.

Parameters:

• x (ndarray) – x-coordinate for knots
• y (ndarray) – y-coordinate for knots
• s (ndarray. [len(x)+1]) – Slopes for line segments. Len: ‘number of knots’ + 1
• delta (ndarray) – Regularization interval, ie. enforce continuity of the derivative
• xv (ndarray) – x-coordinates for points to be interpolated

Returns:

yv – Interpolated values

Return type:

ndarray

pyvib.interpolate.piecewise_linear_der(x, y, s, delta=None, xv=[])

pyvib.interpolate.spline(x, a, xv)

Parameters:

• x (ndarray) – Spline knot (x)-coordinate
• a (ndarray [(len(x),4)]) – Coefficients for each cubic spline
• xv (float) – Current point

Returns:

• yv (float) – Ordinate(y) for point xv
• yvp (float) – Derivative of y for point xv