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?
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Torsten
on 10 May 2023
Edited: Torsten
on 10 May 2023
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].
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Torsten
on 21 Jul 2023
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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