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[Bug-apl] Select from a two-dimensional array
From
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Elias Mårtenson
Subject
:
[Bug-apl] Select from a two-dimensional array
Date
:
Sun, 3 Aug 2014 00:12:41 +0800
Here's a problem I've had on multiple occasions, and I have yet to figure out a nice generic way of dealing with it.
For a one-dimensional array, I can easily select elements based on a bitmap:
0 0 1 0 0 0/⍳6
3
Sometimes I want to do the same from a two (or more) dimensional array:
a
1 2 3
4 1 2
b
0 0 1
0 0 0
b/a
RANK ERROR
b/a
^ ^
How to do this?
Regards,
Elias
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[Bug-apl] Select from a two-dimensional array
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Re: [Bug-apl] Select from a two-dimensional array
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David B. Lamkins
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2014/08/03
Re: [Bug-apl] Select from a two-dimensional array
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Elias Mårtenson
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2014/08/03
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