Table function can be
interpolated.
To set up the
function interpolation type
The possible interpolation types are listed below.
If you want to get a smooth curve, the spline interpolation is the best. However, it takes more time to calculate a spline interpolation than a linear one. So, if a discontinuous function is acceptable, use the linear interpolation.
Interpolation type |
Description and Example |
None |
No interpolation applied. |
Step |
Step interpolation. The function value between two points is the same as in the point with less argument value. |
Linear |
Linear interpolation. The points are connected with straight-line segments. |
Spline |
4^{th} order spline interpolation. The points are connected with 4^{th} order polynomial segments. For each point 0^{th}, 1^{st}, and 2^{nd} derivatives of right and left segments are equal. The 2^{nd} derivative in the ending points equals zero. |
Approximation |
The resulting function is a polynomial of Order you specify in the edit box on the right, formed in order the sum of the root-mean-square error in the points is minimal. |