Plotting FDATE/PDATE args

[hannahzafar]

@embell139 #70 I think this merged PR now requires pdate, so there is no way to call batch plotting of all times (I think?)

[embell139]

OHHHHHHH YES I see. I had started to address that the day before I pushed but forgot before opening the PR! Let me fix it!!

[embell139]

PR #77