Imports gonum.org/v1/gonum/dsp/fourier gonum.org/v1/gonum/dsp/window gonum.org/v1/gonum/floats gonum.org/v1/gonum/stat gonum.org/v1/plot gonum.org/v1/plot/plotter gonum.org/v1/plot/vg Standard library imports bufio flag fmt image/color io log math math/cmplx os strconv strings