Imaginary
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⌾

Imaginary (⌾
) is a monadic scalar function which multiplies the argument by the imaginary unit 0J1
, usually denoted or in traditional mathematics. This can be seen as a mapping from a real number to a pure imaginary number (a complex number with the real part of 0). It was added to J as j.
together with initial support for complex numbers, and was adopted in Extended Dyalog APL using the glyph ⌾
as a monadic counterpart of Complex. In other APL implementations that support complex numbers, Circular with the left argument of ¯11
has the same functionality as Imaginary.
Examples
⌾ 3 ¯4 6
0J3 0J¯4 0J6
Works in: Extended Dyalog APL
Imaginary is equivalent to Complex with the default left argument of 0.
0 ⌾ 3 ¯4 6
0J3 0J¯4 0J6
Works in: Extended Dyalog APL
Documentation
 J Dictionary, NuVoc