st: Graphs by and different axis scales [Stata 9]

["R.E. De Hoyos" <redeho@hotmail.com>]

I am plotting a two-way graph of varX and varY by years (4 years):

   . tw scatter varY varX, by(year)

Y varies so much across the 4 time periods that Stata assigns a very large 
range of variation to Y, say from -100 to +100 for all four years. For any 
given year, the variation in Y is much less than -100 to +100, so I would 
like to have a year-specific axis range. An obvious way of doing this is to 
compute separate graphs for each year:

foreach y in 1 2 3 4 {
   tw scatter varY varX if year==`y'
}

Nevertheless I would like to have the four graphs in a single object (.eps). 
Is there a way to do this?

Thanks,
Rafa 
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