[R] Secondary Y axis title

[hadley wickham]

On 10/18/07, John Theal <jtheal at bluewin.ch> wrote:
> I have the following R code to create a plot with two y axes.  I am
> essentially trying to
> plot a price series with a volume series on the same graph. (i.e. to
> compare price with volume).  I can label the first

Why not use a scatterplot?  You are likely to draw incorrect
conclusions if you look at a double y-axis plot alone.

Hadley

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