Creating vectors

This part will cover

• Vector generating functions
  • Iota
  • Rho
  • Replicate
  • Catenate
  • Roll/deal
• Index origin / Quad IO

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The dyadic replicate / function repeats elements of its right hand argument array by a specified left hand argument array. This allows the use of boolean masks, which makes it commonly used to filter arrays.

       (2|⍳9)/'ballooned'
blond
       (~2|⍳9)/'ballooned'
aloe
       2 1 1 1 1 1/'elfish'
eelfish
       (5=8|⍳26)/⎕A
EMU
       0 0 0 1 1 0 0 0 1 1 0 0/'flamethrower'
meow