DPAK and HPAK: a versatile display and histogramming package. [In FORTRAN for IBM 360/370]

This document describes the features of a display and histogram package which requires a minimal number of subroutine calls in order to generate graphic output in many flavors on a variety of devices. Default options are preset to values that are generally most wanted, but the default values may be readily changed to the user's needs (e.g., size of plot, type of scales, scale factors, plot characters, super-imposing several plots, etc.). The description falls naturally into two parts, namely, the set of routines (DPAK) for displaying data on some device, and the set of routines (HPAK) for generating histograms. HPAK provides a means of allocating memory for histograms, accumulating data into histograms, and subsequently displaying the histograms via calls to the DPAK routines. Histograms and displays of either one or two independent variables can be made. 10 figures.