We should add an option to be able to pass in an existing matplotlib Figure and list of Axes objects to PPSD.plot() as PPSD.plot(..., fig=None, axes=None) like we have for many other plotting routines. The purpose is to make it easier to make figures that have different PPSDs plotted in various subplots/axes. Compare [this post on discourse](https://discourse.obspy.org/t/plotting-ppsd-of-a
The Herschel Extrgalactic Legacy Project enables studies of galaxy formation and evolution by bringing together astronomical survey data sets from many observatories and telescopes and adding scientific value to these.
We should add an option to be able to pass in an existing matplotlib
Figureand list ofAxesobjects toPPSD.plot()asPPSD.plot(..., fig=None, axes=None)like we have for many other plotting routines. The purpose is to make it easier to make figures that have different PPSDs plotted in various subplots/axes. Compare [this post on discourse](https://discourse.obspy.org/t/plotting-ppsd-of-a