[R] two y-axis in xy-plot

[Antje Schüle]

It is nearly the same example I wrote about in http://www.mail-archive.com/r-help@stat.math.ethz.ch/msg54238.html. I'll print it out again:

In the first column I have numbers from 0 to 23 (hours of a day), the second 
column contains the name of a weekday (Day as factor) and the third column 
contains the number I am interested in. So as an example, the first five rows look like that:

     Hour Day Freq

1     0  Mo    23

2     1  Mo    20

3     2  Mo    14

4     3  Mo    27

5     4  Mo    26

 
To read: On Monday between 0 and 1 o'clock 23 things happened. 

Now I add a new parameter, so that the data looks somehow like that:

     Hour Day Freq Freq2

1     0  Mo    23	  874

2     1  Mo    20   476

3     2  Mo    14	  201

4     3  Mo    27   912

5     4  Mo    26   172

Now I'd like to have a plot for every weekday containing the two frequencies as a line during the hours.

Is this possible with two y-axes?

Thanks for your help, 

Antje




-----Ursprüngliche Nachricht-----
Von: Deepayan Sarkar [mailto:deepayan.sarkar at gmail.com] 
Gesendet: Montag, 9. Januar 2006 18:08
An: Antje Schüle
Cc: r-help at stat.math.ethz.ch
Betreff: Re: two y-axis in xy-plot

On 1/9/06, Antje Schüle <Antje.Schuele at komdat.com> wrote:
> Hi there,
>
>
>
> I am wondering if it is possible to do an xyplot with two y-axes. I'd like
> to print two parameters in a time series but they both have different
> scales.
>
>
>
> Which parameter in xyplot can I add to achieve this result?

The answer depends on the details of what you are doing, so please
provide us with a reproducible example.

Deepayan