[R] how to get rid of unused space on all 4 borders in plot() render

[madr]

# 89 px / 105 px - wasted space
png("d:/test.png",width=1369,height=1129,units="px")
par(bg='black',fg='gray',col='gray',col.axis='gray',col.lab='gray',col.main='gray',col.sub='gray')
plot(x,y,ylim=c(-20,20),xlim=c(min(x),max(x)),pch='.',col = rgb(1,1,1,
0.5),yaxt="n", ann=FALSE)
dev.off()

so only "hack" that I thought of is to save graph to a file with dimensions
exceeding my need in exact amount to balance the black space and after that
do auto-crop function in graphic program

original:
http://i55.tinypic.com/qzitqq.png
cropped:
http://i53.tinypic.com/29ntu75.png
-- 
View this message in context: http://r.789695.n4.nabble.com/how-to-get-rid-of-unused-space-on-all-4-borders-in-plot-render-tp3052527p3052675.html
Sent from the R help mailing list archive at Nabble.com.