[ferret_users] Ferret equivalent to Matlab "axis equal"

["Daiwei (David) Wang" <daiwei@xxxxxxx>]

Hi Ferreters,

I wonder if there is an easy way to "set the aspect ratio [of a 
viewport] so that the data units are the same in every direction" as 
with "axis equal" in Matlab [1]. In other words, for example, I'd like 
1-degree-by-1-degree boxes shown as squares, not rectangles, in a shade 
plot.

Thanks,
David

[1] http://www.mathworks.com/help/matlab/ref/axis.html