Search All of the Math Forum:

Views expressed in these public forums are not endorsed by NCTM or The Math Forum.

Notice: We are no longer accepting new posts, but the forums will continue to be readable.

Topic: curve interpolation by parabolic blending
Replies: 2   Last Post: Jun 23, 2013 3:38 AM

 Messages: [ Previous | Next ]
 enprush@gmail.com Posts: 5 Registered: 6/12/13
curve interpolation by parabolic blending
Posted: Jun 22, 2013 8:06 AM

I'm given a set of 25 points(x,y values). I need to curve fit these points using a parabolic blending. I'm not sure how to go about it. I read that we need to take 3 points at a time to ensure a unique parabola is obtained.
I need to:
take first 3 points(1,2,3) and fit a parabola to it.
take the next 3 points (2,3,4) and do the same.
This goes on till i reach my final point. The overlapping portions of any two parabolas is linearly blend using a cubic curve.

So, this looks more like a polyfit of third order except between point 1 and 2. Am i right in continuing on with a ployfit of order 3?

Thanks

Date Subject Author
6/22/13 enprush@gmail.com
6/22/13 dpb
6/23/13 Bruno Luong