cubic spline fit

[cquark]

Hi

I have a curve that I need to smoothen, and hence i decided to use the cubic fit, but I need all the original points of interest. When I tried the Cubic Spline Fit function in LV, I did get a smooth curve but it did not contain the initial points of interest.

I have read in literature that with Cubic splines a smooth curve can be fit on the original points, would like to know how this problem could be overcome.

The original curve adn the fitted curve are attached below

[Darin.K · Accepted solution]

What you should be doing is interpolation instead of fitting.  Two ways to do this.

1. Use the Spline Interpolation VI

2. Set the smoothness to 1 for all points in Cubic Spline Fit