help pdfcairo gives, inter alia:
<quote>
The width of all lines in the plot can be modified by the factor
<lw> specified in `linewidth`. The default linewidth is 0.25
points. (1 "PostScript" point = 1/72 inch = 0.353 cm)
</quote>
Er, that should be 0.0353 cm.
--
Allin Cottrell
Department of Economics
Wake Forest University
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