Polyfit forced through the origin?

[Deastman]

Is there an easy way to force a 3rd order polyfit through the origin or constrain it through a point??

[Deastman]

The General Polynomial Fit allows you to constrain coefficients but not through fixed points.

[dan_u · Accepted solution]

The easiest way (using the functions available in LV) is to set a high weighting to the point you want to cross.

For instance set the weighting to 1 for all points except the origin where you can use a weighting of 100000 or so.

[Deastman]

This worked... I created a weighted array populated with conditionally set weightings for the points that I needed to force the polyfit through.  Thanks for your help!