# transpose

(Redirected from Flip)

Transpose

+x

**transpose**, a.k.a. **flip**, swaps the two leading axes of a 2+ dimensional rectangular array. Dialects differ in their treatment of atoms, lists, and ragged arrays.

+("ab";"cd";"ef") ("ace" "bdf")

Atoms in otherwise rectangular arrays are extended to the full length of the corresponding dimension:

+(`a`b`c;`d) (`a`d `b`d `c`d)

## Atoms and lists[edit]

Transposing a list in oK or ngn/k enlists it. Transposing an atom enlists twice^{[1]}:

+,0 ,,0 +0 ,,0

K3, K4, and Kona^{[2]} return the argument as-is.

K9 throws a rank error.

## Ragged arrays[edit]

oK and ngn/k reshape shorter rows to the length of the longest row:

+(`a`b`c;`d`e) (`a`d `b`e `c`d)

K9 pads shorter rows with nulls:

+(`a`b`c;`d`e) (`a`d `b`e `c`)