Contour plots

[NMR Center Users]

    Does anyone know of any packages/subroutines to produce a contour plot on
an HPGL plotter from a two-dimensional array. If you do not have one, but
know from where I could obtain a public domain program I would still be
extremely grateful for a reply. (If you have a routine for displaying contour
maps on the IRIS screen that would still very useful.)

	Yours optimistically,
		Chris Bauer   (nmr at uk.ac.mrc.nimr)
		MRC Biomedical NMR Centre,
		National Institute for Medical Research,
		Mill Hill, LONDON   NW7 1AA.