Chebyshev Coefficients for Chebyshev polynomials of the first kind.
chebCoeff(fun, a, b, n)
function to be approximated.
endpoints of the interval.
For a function
fun on on the interval
[a, b] determines the
coefficients of the Chebyshev polynomials up to degree
n that will
approximate the function (in L2 norm).
Vector of coefficients for the Chebyshev polynomials, from low to high degrees (see the example).
See the “Chebfun Project” <https://www.chebfun.org/> by Nick Trefethen.
Weisstein, Eric W. “Chebyshev Polynomial of the First Kind." From MathWorld — A Wolfram Web Resource. https://mathworld.wolfram.com/ChebyshevPolynomialoftheFirstKind.html
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