Re: [Groff] background shading using tbl

[Werner LEMBERG]

> \*[shd1]Andy Armstrong#Class 1A#Sciences
> \*[shd0]Alan Beamish#Class 1B#Arts and Humanities
> \*[shd1]Brian Aldwych#Class 2A#Media Skills
> \*[shd0]Beowulf Budweiser#Class 2B#Brewing and Biochemistry
> \*[shd1]Charlie Dimmock#Class 3D#Self-Support

This is not optimal.  Just imagine the insertion of an entry, and you
have to adjust all of the `0' and `1' numbers which follow.

Instead, as I've suggested, you should use a string with an automatic
flip (which then either calls \*[shd1] or \*[shd0]):

  .nr colour-flip 0
  .ds shd \R'colour-flip (1 - \\n[colour-flip])'\\*[shd\\n[colour-flip]]
  ...
  \*[shd]Andy Armstrong#Class 1A#Sciences
  \*[shd]Alan Beamish#Class 1B#Arts and Humanities
  \*[shd]Brian Aldwych#Class 2A#Media Skills
  \*[shd]Beowulf Budweiser#Class 2B#Brewing and Biochemistry
  \*[shd]Charlie Dimmock#Class 3D#Self-Support


     Werner