function histogram
Create a histogram of given array.
Syntax
result = histogram(a [, min [, max [, binsize]]] [, /reverse])
Arguments
| a: | 1D or 2D Array |
| min: | Datapoints with a value smaller than min are neglected. |
| max: | Datapoints with a value greater than max are neglected. |
| binsize: | Default is 1. Values between are rounded |
Switches
| /reverse: | Create the reverse indices of a histogram |