spline
Cubic spline interpolation function.
Syntax
spline(old_x, old_y, new_x)
Argument
- old_x
- The x vector of the curve to be interpolated.
- old_y
- The y vector of the curve to be interpolated.
- new_x
- A vector containing x values for which new y values are to be calculated.
Example
| Templex Expression | Results |
|---|---|
{spline({0,3,5,8}, {2,5,9,7}
,1:5:1)} |
2.43519, 3.29398, 5, 6.89583, 9 |
| Curve Math Vectors | Results |
|---|---|
x = new_x
|
Given c1, a curve is created with interpolated y values at each point of new_x. |
Comments
The spline function uses a cubic spline interpolation method to sample data. It estimates a y-value for each element in new_x such that the new points lie on or near the curve defined by old_x, old_y. old_x, old_y and new_x must have the same number of elements. old_x must be strictly increasing.
spline performs interpolation only. All values of new_x must fall between the minimum of old_x and the maximum of old_x.