From: Marc Schwartz <MSchwartz_at_mn.rr.com>

Date: Fri 10 Jun 2005 - 02:48:44 EST

R-help@stat.math.ethz.ch mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Fri Jun 10 02:53:40 2005

Date: Fri 10 Jun 2005 - 02:48:44 EST

On Thu, 2005-06-09 at 09:26 -0700, Hai Lin wrote:

> Dear R users:

*>
**> I am trying to add a label on axis(4) but I don't find
**> any reference in R archives. Could you please help me
**> out?
**>
**> Thanks in advance.
**>
**> The followings are the data set and what I have done:
**>
**> Sample data:
**>
**> time y1 y2
**> 2 9 24.396
**> 4 7.667 19.082
**> 10 4.667 73.984
**>
**> Commands:
**> plot(time,y1,type='l',col='red',ylab="Relative
**> levels", xlab="Age of Mice",ylim=c(0,20))
**> points(time,y1 col="red", pch=19)
**>
**> op <-par(new=T)
**> plot(time,y2,type='l',
**> col='green',axes=F,xlab="",ylab="", ylim=c(0,80))
**> points(time,y2,col='green',pch=24)
**> axis(4)
*

There are two options:

First, use:

par(mar = c(5, 4, 4, 5))

before your first plot to increase the margin on the right hand side for the second Y axis label. You can further adjust these as you may require. See ?par for more information.

Then, after the second plot:

- Use mtext() as follows:

mtext(4, text = "This is Y Axis 2", line = 3)

Note however that the text is facing outward. Adjust the 'line' argument to move the text in or out as you need.

2. Use text() as follows:

text(11.5, 40, "This is Y Axis 2", srt = 270, xpd = TRUE)

This enables you to place the text outside the plot region (xpd = TRUE) and rotate it so that it is facing inward. Adjust the x and y positions as you need.

See ?mtext and ?text for more information.

**HTH,
**
Marc Schwartz

R-help@stat.math.ethz.ch mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Fri Jun 10 02:53:40 2005

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