15.5.312 histr

histr(x [, /first, /silent])

Returns the normalized (to between 0 and 1) running sum of the histogram of x. The histogram runs between values !histmin (zero or negative) and !histmax, and cannot exceed !maxhistsize bins. If /first is specified and x is multidimensional, then histograms along the first dimension are returned. By default, a single histogram of the whole array is returned.

By default, a warning is issued if x contains negative values (so that the first element of the histogram does not refer to value 0 from x but to the most negative value). If /silent is specified, then the warning is suppressed.

See also: hist