Cubic spline interpolation with slope at left end equal to zero?
7 views (last 30 days)
Show older comments
Hi, all,
I am doing a cubic spline interpolation with some data points. I want the slope at the left end to be zero and don't do anything to the slope at the right end(In the online example, both slope at both ends are forced to be zero). Does anyone know how to do this? Thank you.
Here is my data points:
if true
x = [0,0.152789493879,0.305539702586,0.458371723707,...
0.59356259,0.728929965449,0.864429595769,1];
y = [0,0.013083199999528,0.155041100006201,0.209241100004874,...
0.178395800001454,0.093888600007631,-0.033515100003569,-0.196524899991346];
end
2 Comments
Accepted Answer
John D'Errico
on 25 Apr 2014
pp = slmengine(x,y,'knots',x,'leftslope',0,'result','pp');
There are many other things it can do, but this is a simple one. You can get the result in a pp form as I show, or in my own SLM format.
3 Comments
John D'Errico
on 26 Apr 2014
Edited: John D'Errico
on 26 Apr 2014
No. Never put downloaded files in the MATLAB toolbox directories. This will cause problems. Instead, put the downloaded (unzipped) directory some place on your drive, then add that directory to your MATLAB search path. (Use pathtool for this, saving the new search path afterwards.)
More Answers (0)
See Also
Categories
Find more on Splines in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!