INTEGERS (1) The shape of i.y is |y, and its atoms are the first */|y non-negative integers. For example:
i. 2 3 i. 2 _3
0 1 2 2 1 0
3 4 5 5 4 3
i. '' i. 4 i. _4
0 0 1 2 3 3 2 1 0
As shown in the examples, a negative element in y causes reversal of the atoms along the corresponding axis.
INDEX OF ( _ _ ) If rix is the rank of an item of x, then the shape of the result of x i.y is (ΓÇôrix)}.$y. Each atom of the result is either #x or the index of the first occurrence among the items of x of the corresponding rix-cell of y. The comparison in x i.y is tolerant.