cairo terminals and aspect ratio

[Allin C. <cot...@wf...>]

I've been playing with pngcairo and pdfcairo and I like what I 
see.

However, I've hit one problem, with a polar plot where I want a 
(really circular!) circle in the output.  In the old png and pdf 
terminal I can achieve this with

set size square

But this does not produce a circle in pngcairo and pdfcairo: it 
produces a vertically elongated ellipse.  In pngcairo I get what 
looks like a perfect circle with

set size ratio .5

In pdfcairo this produces an approximation to a circle, but not a 
very good one.

-- 
Allin Cottrell
Department of Economics
Wake Forest University, NC