[R] how to plot a nice legend?

[Jonas Stein]

> There are various alternatives available; you can also write your own, 
> by modifying the standard one.

> Generally there are lots of possibilities for customizing within the 
> standard one; e.g. y.intersp will affect the line spacing, using a 
> negative value for inset (together with xpd=NA) will allow the legend to 
> be moved outside the plot.

i tried without success:

plot(1:10)
legend(1,3, legend=c("one", "two"), inset=-1, xpd=NA)

The legend is still placed inside the plot on point (1,3)

What could i have done wrong?

Can i include a legend like this in a standard plot like 
plot(1:10) too?
http://www.r-bloggers.com/wp-content/uploads/2011/03/heatmap.png

kind regards,

-- 
Jonas Stein <news at jonasstein.de>