Comments (1)
This is a bit tricky, as an even number of coefficients requires the highest-order term to be a sin
, whereas in a real DFT, one requires all sin
terms to be matched by a cos
term, with potentially an extra Nyquist cos
term without a matching sin
. In this case, either we evaluate the inverse transform as f.(points(f))
if ncoefficients(f)
is even, or we pad a dummy zero cos
coefficient and require the number of points to be odd. In the latter case, we may use FFTs for the inverse transform, so this is the approach that I prefer.
from approxfunfourier.jl.
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from approxfunfourier.jl.