... plotutils (or The GNU Plotting Utilities) are a set of programs and functions for drawing and data plotting. They include graph , a program for plotting two-dimensional scientific data. The programs are built on top of GNU libplot , a library for device-independent two-dimensional vector graphics. graph can display a graph under X-Windows and produce output in several file formats. ... http://www.gnu.org/software/plotutils/plotutils.html . ... Scientific Data Processing Visualization | ...