Thank you, very clear.
Verb showlist shows lists vertically. J shows vectors horizontally and
other lists vertically. The consistency of showlist helped my
understanding, but J's display is better because it is compact and we
are used to reading horizontally, then vertically.
showlist =: [: ": ,."1
i. 4 NB. list
0 1 2 3
showlist i. 4 NB. list
0
1
2
3
i. 2 4 NB. list of two lists
0 1 2 3
4 5 6 7
showlist i. 2 4 NB. list of two lists
0
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7
i. 3 2 4 NB. list of three lists of two lists
0 1 2 3
4 5 6 7
8 9 10 11
12 13 14 15
16 17 18 19
20 21 22 23
showlist i. 3 2 4 NB. list of three lists of two lists
0
1
2
3
4
5
6
7
8
9
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Kip
On Thu, 9 Aug 2007, Rob Hodgkinson wrote:
Sorry for the poor layout (from HTML format), here is the table again:
Consider f²K i.2 3 4 5 then:
For K... k-cell frame k-cell shape Comment
0 2 3 4 5 '' (empty) 2x3x4x5 array of scalars/singletons
1 2 3 4 5 2x3x4 array of 5 element vectors
2 2 3 4 5 2x3 table of 4x5 tables
3 2 3 4 5 2 lots of 3 4 5 arrays
4 '' (empty) 2 3 4 5 a singleton 2x3x4x5 array
And for -ve k ...
_1 2 3 4 5 2 lots of 3 4 5 arrays
_2 2 3 4 5 2x3 table of 4x5 tables
_3 2 3 4 5 2x3x4 array of 5 element vectors
_4 2 3 4 5 '' (empty) 2x3x4x5 array of scalars/singletons
Hope this displays better, sorry..../Rob
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Kip Murray
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http://www.math.uh.edu/~km----------------------------------------------------------------------
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