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Topic:
Binary or Logical Selection : Given an array A and a binary or logical vector S, how do I select the rows of A when S = 1 or True ?
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2
Last Post:
Sep 24, 2012 5:36 AM




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


> I can imagine that referees don't like mathematical explanations in > > terms of APL  unless yours is a paper about APL (does the language > > still exist?). But I can't think of an elegant way to express this in > > standard vector notation either. This newsgroup is only concerned with > > the development and application of computeralgebra systems like Maxima > > or Maple, I am therefore widening the audience to include sci.math. > > > > Can anybody help the original poster? > > > > 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 multitasking, 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.labtools.com/instrumentation/#FPGA_Modular_Firmware_Skeleton Thanks again, much appreciated, cheers, Beau



