Hey Hauke, I think writing to files and running processes is not an uncommon
way to interface with GNU Plot/GPLK because they have their own DSLs and
therefore support text intermediaries. Obs. not GNU Scientific. Point is moreso
that I'd want to be able to work with J data types, seamlessly call/chain GSL
functions, get J data types back, and make a plot entirely unaware of
differences between these core libraries and J itself. Emir
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