On 2011-01-18 16:27, Ben Harrison wrote:
[...snip...]
plot(Ozone ~ Temp, data = aq)
This highlights one of the very confusing aspects of R language for me;
is plot(x, y) the same as plot (y ~ x)? Seems to be, but maybe I'm
missing some nuance.
plot has many methods; see with methods(plot).
If you go to the help page for plot you'll be pointed
to plot.default and plot.formula (under 'See Also').
Have a look at those to see what the difference is.
The formula method is useful in that it permits you
to set the 'data' argument (which obviates the need
for 'attach'ing.
[...snip...]
BTW, attach() is not usually a good idea; have a look at ?with.
Great, I thought I had that trick nailed. Obviously there needs to be an
R equivalent of l2tabu.
I wouldn't call it a sin, but I find alternatives like with()
and 'data=' much more convenient.
Peter Ehlers
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