Thanks for putting together CLNUPLOT. I had some interest in putting labels on the x axis with a box plot -- i.e., being able to do something like

CLNUPLOT> (write-plot (clnuplot:make-plot
:bar
'((1 2 "a") (2 2.5 "b") (3 3.1 "c"))
:linewidth 3.0
:key "off"
:filename "bar12"
:xlabel "Bin Number"
:ylabel "Dance Partners"
:x-coord #'first
:y-coord #'second
:title "Bin Number versus Dance Partners"
:ymin 0.0) :postscript)
#<GNUPLOT {B5EFB49}>
CLNUPLOT>

If interested, the attached diff should support the above syntax... The main changes:
- extending the data points for the box plot type so that there is a fourth 'column', the label column
- altering the plot command to use xticlabels

Thanks again,

Alan