[R] Secondary Y axis title

John Theal jtheal at free.fr
Thu Oct 25 09:47:09 CEST 2007

I think 'usr' can be used to specify the  extent of the plotting  
region.  So it is useful if, say, you are creating a multiplot window  
and want to scale all plots for comparison. I think that (for  
multiplots) xlim has limited usefulness.

On 23-Oct-07, at 10:12 PM, Dave Hewitt wrote:

> No problem. I still think it's too bad that mtext can't handle  
> reading direction changes. Seems simple to implement, and mtext is  
> a lot easier to understand than text. I remain confused about 'usr'  
> in par.
> d

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