文件名称:LNinterpolation
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拉格朗日插值也叫两点插值，已知函数y = f (x)在给定互异点x0, x1上的值为y0= f (x0)，y1=f (x1)线性插值就是构造一个一次多项式
P1(x) = ax + b
使它满足条件
P1 (x0) = y0 P1 (x1) = y1-Lagrange interpolation, also known as two points interpolated known function y = f (x) given different point x0, the value y0 on x1 = f (x0), y1 = f (x1) linear interpolation is construct a polynomial P1 (x) = the AX PPLS b that it satisfy the condition P1 (X0) = Y0 P1 (x1) = Y1
P1(x) = ax + b
使它满足条件
P1 (x0) = y0 P1 (x1) = y1-Lagrange interpolation, also known as two points interpolated known function y = f (x) given different point x0, the value y0 on x1 = f (x0), y1 = f (x1) linear interpolation is construct a polynomial P1 (x) = the AX PPLS b that it satisfy the condition P1 (X0) = Y0 P1 (x1) = Y1
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LNinterpolation.m