Computes the reconstruction of input data using a matrix as a
user-defined orthogonal basis. A warning is produced if the input
matrix B is non-orthogonal. Plots results as an option. The
reconstructed function and amplitude spectra (optional) are returned.
Joshua Carmichael (2021). igft (https://www.mathworks.com/matlabcentral/fileexchange/18309-igft), MATLAB Central File Exchange. Retrieved .
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