Hi, Can someone point me to some Julia code that calculates a matrix for the derivatives of the Chebyshev polynomials T_j, at given values, ie
d^k T_i(x_j) / dx^k for i=1,..n, j for some and vector x. The Chebyshev polynomials themselves are very easy to calculate using the recurrence relation, but derivatives are not. Alternatively, maybe this can be extracted from ApproxFun but I have not found a way. Best, Tamas
