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Re: Binary or Logical Selection : Given an array A and a binary
orlogical vector S, how do I select the rows of A when S = 1 or True ?
Posted:
Sep 24, 2012 5:36 AM
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> I can imagine that referees don't like mathematical explanations in
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> terms of APL - unless yours is a paper about APL (does the language
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> still exist?). But I can't think of an elegant way to express this in
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> standard vector notation either. This newsgroup is only concerned with
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> the development and application of computer-algebra systems like Maxima
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> or Maple, I am therefore widening the audience to include sci.math.
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> Can anybody help the original poster?
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> Martin.
Thank you indeed Martin,
I understand that, and now have it expressed in Latex.
I will now insert the definition in the paper.
In answer to your question, yes, there are a number of actively developed variants of Apl. I write in a number of array based languages including Maple, Matlab and LabVIEW, but AplX from MicroApl is my favourite - it is multi-tasking, can generate standalone GUIs, and talk to FPGAs, so I use it for my NMR instrumentation control and data analysis.
To see running examples with GUIs and FPGAs, see the YouTube videos pointed to at :
http://www.lab-tools.com/instrumentation/#FPGA_Modular_Firmware_Skeleton
Thanks again, much appreciated,
cheers,
Beau
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