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A Versatile Generalized Computer Program for Generating Calcomp Plots of Data Points, Histograms, and Functions¹

A FORTRAN IV program using CALCOMP drum plotter routines was written, incorporating the features present in two programs previously reported by other authors and adding other capabilities. Rectangular graphs can be prepared with one or two X axes and one or two Y axes, and each pair of parallel axes may be drawn at different scales. Several lines of descriptive labeling are possible for both horizontal and vertical axes. Data points may be plotted either as histograms with or without hatchings or as individual symbols. The symbols may be isolated or connected with dots, dashes, or combinations of dots and dashes in different lengths. Plots can be generated for numerous functions representable in Cartesian coordinates. The resulting graphs are suitable for publication.

Key Words: Graphs • Bar graphs • FORTRAN

² Professor and graduate research assistant, Dep. of Plant and Soil Science; and research associate, Computer Center

Received for publication July 26, 1975.