Re: Plot two graphs with different ranges in one

> From: Mark Knecht <markknecht@...>
> Subject: Re: [R] Plot two graphs with different ranges in one
> To: "Rolf Turner" <r.turner@...>
> Cc: "r-help@..." <r-help@...>
> Received: Thursday, July 2, 2009, 8:43 PM
> On 7/2/09, Rolf Turner <r.turner@...>
> wrote:
> >
> >  On 3/07/2009, at 11:29 AM, Hongwei Dong wrote:
> >
> >
> > > Hi, I'm trying to plot two variables in one
> graph. One ranges between 0
> > and
> > > 1, while the other ranges between 50 and 500. Can
> I plot them in one graph
> > > with similar scale?
> > >
> >
> >  Yes you can, but DON'T!!!  Such graphs are
> terribly misleading and
> > confusing.
> >
> >  But if you insist --- and be it on your own head
> --- see
> >
> > http://wiki.r-project.org/rwiki/doku.php?id=tips:graphics-base:2yaxes
> >
> >  Don't say I didn't warn you!
> >
> >         cheers,
> >
> >             
>    Rolf Turner
>
> Add color. Make one data set red, the other blue. Colorize
> the y
> axises appropriately. then it's reasonable and I find in
> some cases
> useful. (Wish I knew how to do it in R...)
>
> I agree - in black and white it's almost useless.
>
> cheers,
> Mark
>
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