how can i write a code to find maximum error in Lagrange polynomial for given functions?
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im having defficulties in writing matlab cod to
- Find the maximum error in using to approximate on the interval [0, 2]. can any one help?
回答（1 个）
Choose a fine enough grid x on [0,2], evaluate your function(s) f(x) and the Lagrange polynomial(s) L(x) for the grid points and build abs(f(x)-L(x)). This should give you a good approximate value for the maximum error on [0,2].
2 个评论
Alvira Yawar
2023-7-20
Hi can you please share a sample program for the same
Torsten
2023-7-21
If L_eval is your function for evaluating the Lagrange polynomial, you can use
x = linspace(0,2,100);
max_error = max(abs(f(x)-L_eval(x)))
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