Hello, It is possible to set the aspect ratio of the Y-axis to the X-axis in xyplot (a) xyplot(y~x,aspect=1.8) Suppose I have only 1 panel and i wish to set the length of the X- axis to 2" keeping the same aspect ratio as in (a), I suppose i need to do something in prepanel but what? Is there any function i can call to set the actual length of the axes? Saptarshi Guha | saptarshi.guha at gmail.com | http://www.stat.purdue.edu/~sguha