﻿ Vector, the Journal of the British APL Association

# Current issue

Vol.26 No.4

## Volumes

© 1984-2018
British APL Association
All rights reserved.

Archive articles posted online on request: ask the archivist.

Volume 15, No.3

Note:
The clues for the new crossword contain some APL characters. These are coded as APL2741 (available as a 45K download), and also with <CODE> tags. The mapping is compatible with both the APL2000 font and the current Dyalog font.

## Crossword from 15.3

Across
1. The inverse of `+/`, i.e. the first difference of `V`
6. `1‡²‡'[(A)]'`
9. `1ƒ¼4`
10. Accept numeric input; call it `NMV`
11. Negate the vector `MB` and show its running total, `LIFO` (last in, first out ) basis
13. Given distinct values in `A`, return `¼½A` without using `½`
14. Where `T` is found in `V`
15. `(R§11)½11/V`
16. The elements of `V`, capped at `99`
18. `3†'(0¹3†V)'')'`
19. `SN` is contained in...
20. The two row matrix `YM` of year and month numbers, converted to months since the year `0000`, for date arithmetic
22. If `SV` represents Scalar left argument, Vector right argument, what combination can cause `LENGTH ERROR` for scalar functions?
23. `(V§25)+(25§N>0)-(25§N<0)`
25. The magnitude of `K`
27. Outer product product
28. The location of `V`’s first `9`
31. Evaluated input as a vector
32. The opposite of `+/` (silly)
33. For scalar `MA`, `+/20½MA`
35. `10 13 16 19 ... 34`
39. The number of elements in any array `V`
40. `(¼5)°.=(¼5)`

Down
1. The fractions used to spread a value, given relative weights in the vector `V`
2. `¯1‡(¯1†V9),V9)`
3. `9 8 7 6 ... 1`
4. `~^/,B`
5. One more than `VN` if any of `Y` are true
6. The system command for `ŒNL 2`
7. Set A as the indices of the elements of the vector `NV`
8. The distinct values in the character vector `V`
12. A nice acronym for `¼0`
15. If `N` is `1 9 9 2`, an expression that returns `1992`
17. The values of the matrix `M`, rounded to the nearest integer
18. If `VN=0`, return `¼0`; but if `VN` is positive, return two elements of ...
20. The number of `1`s in the vector ...
21. `10½¼M`, in origin 0
24. Add to `EACH` of the elements of `V` the numbers 1 to 5
26. Fido’s favourite variable name
28. The location in `V` of `27` and ...
29. `(2/(2½(1½'()')))`
30. Are there some elements in ...
31. The matrix `M` expressed as a vector, with a `0` after each row
34. `___A` is true only if `A` is a nonscalar
36. `2*5`
37. `¯2†'–(¼9)'`
38. The most efficient expression that returns `1`

Reprinted with kind permission from Zark APL Tutor News, a quarterly publication of Zark Incorporated, 23 Ketchbrook Lane, Ellington, CT06029, USA

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