R basic parameters (par) to help create a great looking boxplot....

gistfile1.txt

load("some_data.RData")
png(file=output.png",width=1200,height=1200)
par(cex.main = 1.5, mar = c(5, 6, 4, 5) + 0.1, mgp = c(3.5, 1, 0), cex.lab = 2.0, 
    font.lab = 2, cex.axis = 2.0, bty = "n", las = 1, family="serif")

boxplot(formula~categories,
        data=mydata, 
        ylim=c(0,100), 
        cex.out = 1,
        col="blue",
        xlab="X-label", 
        ylab="Y-label")