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Given the set of points, let say (xo, yo), (x1, y1),.....,(xn, yn) how to find polynomial via spline interpolation (Cubic/quadratic)

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Avenash Kumar
Avenash Kumar 2016-3-13
回答： Image Analyst 2016-3-13
Given the set of points, let say (xo, yo), (x1, y1),.....,(xn, yn) how to find polynomial via spline interpolation (Cubic/quadratic)
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John D'Errico
John D'Errico 2016-3-13
编辑：John D'Errico 2016-3-13
What is your question? Is this homework? if so, then it is time to do your work.
If you need to generate a spline, then surely spline.m is the answer, or pchip.m, or perhaps have a go at spapi.m. So I'm not at all sure what is the actual question here, or at least the reason behind your question. Surely if I wanted to fit an interpolating spline, I would have started with spline.m.

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Image Analyst
Image Analyst 2016-3-13
I'm attaching my spline and polyfit demos. Adapt as needed.
As you know, with splines you get a new polynomial between every pair of points.
Muhammad Usman Saleem

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