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拉格朗日插值、分段线性插值、三次样条插值

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Interpolation

拉格朗日插值、分段线性插值、三次样条插值

问题描述

对函数
$$f(x)=\frac{1}{1+15x^2}$$
构造插值函数,插值区间为$[-1,1]$,给定节点为$x_j = -1+jh, h = \frac{2}{n}, j=0,1,...n$。
n=10,分别利用lagrange插值,分段线性插值,三次样条插值给出相应的函数曲线和数据表,并分析误差及成因。

求解效果

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拉格朗日插值、分段线性插值、三次样条插值

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