Plotutils 2.4.1 - GNU Plotting Utilities.

The GNU plotting utilities, sometimes called 'plotutils', include: (1) GNU libplot, a shared library for exporting 2-D vector graphics files and for performing vector graphics animation under the X Window System. Its output file formats include the new WebCGM format, pseudo-GIF, PNM, Adobe Illustrator, Postscript (editable with the free 'idraw' drawing editor), Fig (editable with the free 'xfig' drawing editor), PCL 5, HP-GL and HP-GL/2, Tektronix, and GNU metafile format. Many Postscript, PCL, and Hershey fonts are supported. A separate class library, 'libplotter', provides a C++ binding to libplot's functionality. (2) Sample command-line applications 'graph', 'plot', 'tek2plot', 'pic2plot', and 'plotfont', which are built on top of GNU libplot. 'graph' is a powerful utility for XY plotting, 'plot' translates GNU metafiles to other formats, 'tek2plot' translates legacy Tektronix data, 'pic2plot' translates box-and-arrow diagrams in the pic language, and 'plotfont' plots character maps. (3) Command-line applications 'spline', 'double', and 'ode', which are useful in scientific plotting. 'spline' does spline interpolation of input data of arbitrary dimensionality. It uses cubic splines, splines under tension, or cubic Bessel interpolation. 'ode' is an interactive program that can integrate a user-specified system of ordinary differential equations.