How to manually set an aspect ratio

[Scott Barnden]

Hi,
    I need to manually set a aspect ratio for a series of data that i 
am plotting. I'm using octave 2.9.9 (i686-redhat-linux-gnu) with Gnuplot 
4.0. So far the command plot(DATA,"equal") is the best i have been able 
to do but its not enough for what I need. Gnuplot has the command: set 
size ratio X, where X is the ratio required but it seems the low level 
gset command no longer exists in this version despite being included in 
 the replot section of the documentation. Is there any other way to 
manually define an aspect ratio for plotting/printing?

Thanks.