This version is based on PLplot-5.2.1, which is a large step forward
compared to PLplot-5.0.4 that yPlot was based on before. For example,
the egregious rendering bugs in example 8 (doc/x08.i) are now long
gone, and the revised doc/x08.i and doc/x11.i show off some new
contouring functionality that is now available with PLplot 3D
plotting. The doc/x??.i examples from yPlot produce identical results
to the corresponding C examples from PLplot which is an excellent test
of the yPlot interface to PLplot. Note the yPlot API changes and
additions in the CHANGES file.