GroupedTransforms.jl

Fast Grouped Transformations as introduced in Bartel, Potts, Schmischke, 2021 .

GroupedTransforms.jl provides the following fast algorithms:

• nonequispaced fast transformation with exponential functions for grouped index sets based on the NFFT (non-equispaced fast Fourier transform)
• nonequispaced fast transformation with cosine functions for grouped index sets based on the NFCT (non-equispaced fast cosine transform)

In Julia you can get started by typing

] add GroupedTransforms

then checkout the documentation.