Cubic spline interpolation with slope at left end equal to zero?
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Qingjie
el 25 de Abr. de 2014
Comentada: Qingjie
el 30 de Abr. de 2014
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 comentarios
John D'Errico
el 25 de Abr. de 2014
Why do you think you need the (if true) conditional wrapped around it?
Respuesta aceptada
John D'Errico
el 25 de Abr. de 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 comentarios
John D'Errico
el 26 de Abr. de 2014
Editada: John D'Errico
el 26 de Abr. de 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.)
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