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New Crossword and Solution for 18.3

Vector 18:4, page 38

competitions and puzzles

Transcribed from the printed issue; not yet reviewed. Read it in the PDF of the issue, page 38

New Crossword

The empty 12 by 12 crossword grid, numbered 1 to 33

Across

  1. .01, as a reciprocal
  2. (~V∊BT)/V
  3. The index within numeric vector V of the nearest value ≥ scalar S
  4. Set M to 1 if any of the vector VE is true, or if any of vector C is untrue. Else set it to 0
  5. The larger of G or JL
  6. (R<10↓VL),(R<10↑VL)
  7. (⍴M)⍴(E⌽M[1;]),(E⌽M[2;]),(E⌽M[3;]),...
  8. An N by N matrix of 0s
  9. The location in vector VA where A first occurs
  10. K=(×/⍴AT)⍴AT for scalar K
  11. The smallest number in each row of matrix RNT
  12. ○1
  13. Bit vector to index vector : BV___BV
  14. ÷10
  15. (B*2)*.5
  16. ((-/5 4*2)*.5)×(⍳N)=⍳N
  17. Rank (of an arrray)
  18. (+/LM[1;]×A[1],(+/LM[2;]×A[2]),...
  19. Cumulative product of
  20. Flag the leading 1s in Boolean V
  21. The number of elements in matrix A
  22. The number of rows of MAT with more than one occurrence of substring SS

Down

  1. MT[;1]÷MT[;2] for two-column MT
  2. Is A numeric?
  3. ⍋V⍳E for character vector V
  4. S<G≤0 for Boolean S
  5. The values of R, with negatives replaced by 0s, and with B on the front
  6. ∨/J=TV for vector J and scalar TV
  7. MAT[⎕IO;] without using indexing
  8. Bits that flag each first distinct value in vector V
  9. Let’s start from scratch
  10. The matrix TB with a column of 12s stuck on its left side
  11. (⌽NT)/⌽N
  12. (K⍴3),(L-K)⍴0
  13. N,(N-1),(N-2),(N-3),...,1 (origin 1)
  14. (+/V)⍴1 for positive integer vector V
  15. Round the elements of array VS
  16. P×(9÷P)-⌊9÷P
  17. (⍴L)+(⍴A) for vectors L and A
  18. B+B for Boolean vector B
  19. R←A and R[A/⍳⍴A]←S or R←___
  20. Product of
  21. All of

Solution to Crossword in 18.3

The completed 12 by 12 crossword grid from Vector 18.3, filled with APL symbols, names and digits; row 1 reads 1 ⊥ M A T, then ⌽ V, then ⍴ ⍕ N, and the bottom row reads 0 ⍴ 0, then 1 ⍕ M A T R I X