[R] Scaling in plot function

[Prasanna BALAPRAKASH]

Dear R helpers,

I have a vector of 500 numbers and I need to plot them in such a way  
that the first 250 values should occupy 80% of the plot and the  
remaining ones should take 20%. More precisely, x axis ranges form  
1:500 and the idea is to give the snapshot of the first 250 values. I  
tried  "axis()" and log="x", but I am not getting the required output.


Thanks
Prasanna