Fitting a linear sine curve with natural spline

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Abi sek 2018-2-27

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https://ww2.mathworks.cn/matlabcentral/answers/385077-fitting-a-linear-sine-curve-with-natural-spline

评论： Torsten 2018-2-27

I am relatively new to Matlab. The threads that I searched regarding the topic is in vain. Through core Matlab functions, kindly assist in fitting a linear sine curve(s(x)=sinx) between o and 2*pi with a natural and cubic spline. In terms of the natural spline, we can use condition: second derivatives at the two ends of the spline are set to zero. For cubic spline, we can use condition: Tangent direction of the cosine curve at the two endpoints to be the starting and ending tangent vectors.

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Abi sek 2018-2-27

编辑：Abi sek 2018-2-27

Hi Torsten, It does directly call the function spap directly.But, I need to have a detailed breakdown code which mainly encompasses the double derivatives at the two endpoints are zero in case of the natural spline.

Regards, Abhi

Torsten 2018-2-27

So you search for an approximating spline for which you worry about the end conditions ? That's unusual. I guess that you will have to write your own code to implement such a speciality.

Best wishes

Torsten.

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