I have an array of shape (2 n), and I want to determine if it has a kind of alternating pattern, where 1s must appear on alternate rows, when reading from left to right.
Some examples that do 'alternate': 1 0 0 1 0 1 0 1 0 0 1 0 0 1 0 1 0 1 0 1 0 1 0 0 1 0 0 0 0 1 1 0 0 0 1 0 0 0 Some examples that do not 'alternate': 1 0 0 0 1 0 1 1 0 0 1 0 0 1 0 1 1 0 1 0 0 1 0 0 0 1 0 0 1 0 1 0 1 1 0 0 How can I recognise these cases? Thanks. ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
