| Indices | I. 1 _ _ | Interval Index |
|
I. y ↔ (# i.@#) y
|
x is assumed to be sorted in ascending or descending order; ascending is assumed if all the items of x are the same. The comparison used in the ordering is not tolerant. If y has the shape of an item of x ,
then x I. y is the
least non-negative j
such that j{x follows y in
the ordering, or #x if y follows {:x in the ordering
or if x has no items. In general, the search applies
to the rank 0>.(#$x)-1 cells of higher-ranked y .
|
I. 0 0 1 0 1 0 2 4 ] x=: ?. 10$20 6 15 19 12 14 19 0 17 0 14 10 I.@:< x 1 2 3 4 5 7 9 0 2 2 5 I. _5 1 2 3 9 0 0 1 1 3 4 0 histogram=: <: @ (#/.~) @ (i.@#@[ , I.) d=: +/ 10 1e6 ?.@$ 21 NB. data e=: 5 * i.40 NB. interval end-points h=: e histogram d $ h 40 h 0 0 0 0 1 6 38 151 400 1093 2417 5274 9732 17014 26482 39266 54622 70277 85594 96077 101359 101033 94374 82241 67322 52201 36777 24419 15174 8526 4666 2091 880 348 99 34 12 0 0 0 load 'plot' plot e;h
