Imports go-hep.org/x/hep/csvutil go-hep.org/x/hep/hplot gonum.org/v1/gonum/dsp/fourier gonum.org/v1/plot/palette gonum.org/v1/plot/plotter gonum.org/v1/plot/vg gonum.org/v1/plot/vg/draw Standard library imports bufio encoding/csv fmt image/color io math math/cmplx