Quick followup. I realized you don't have to mess with (somewhat
awkward) AV File Manager to see files in Android/data. I finally looked
at J documentation at wiki/Plot/Commands/Output commands and saw pdf
[file w h]! Never knew you could direct the plot to any desired folder.
So I just changed pd 'pdf' in my code to
pd 'pdf /storage/emulated/0/Documents/my_plot,pdf'
and the plot goes to the *readable* Documents folder.
--Patrick
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