R help - Feb 2010 - Suppressing scientific notation on plot axis tick labels

Is there a better alternative to

x  = c(1e7, 2e7)
x.lb = c(0,1e7,2e7) 
s.lb = format(x.lb, scientific = FALSE, big.mark = ",")
barplot(x, yaxt = "n", ylab = "") 
axis(side = 2, at = x.lb, labels = s.lb)

(I am sure there is a better alternative to line 2 :)). 

Thank you.
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Ruben Roa has kindly suggested using 'scipen' option - cf.
> fixed notation will be preferred unless it is more than ?scipen? digits
> wider.
However, 

options(scipen = 50)
x  = c(1e7, 2e7)
barplot(x) 

still does not produce the desired result.

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options(scipen = 50, digits = 5) 
x  = c(1e7, 2e7) 
barplot(x) 

Still scientific...
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