On/Off

If the input is a numeric array, it returns a cell array of strings of 'on' or 'off' depending on the logical outcome.

Conversely, if the input is a cell array of strings of 'on' or 'off', then it does the reverse, i.e. returns the logical matrix where 'on' is true and 'off' is false.

It is very useful when using set/get on arrays of handle objects or arrays of properties/values.

Example:
onoff('[0, 1, 0]) gives {'off', 'on', 'off'}

onoff({'on', 'on', 'off'}) gives [1, 1, 0]

It also works for mixed cell array inputs, and for other string pairs:
yes/no, ok/cancel, open/closed