From: Marc Schwartz (via MN) <mschwartz_at_mn.rr.com>

Date: Sat 10 Jun 2006 - 06:00:17 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 Sat Jun 10 06:11:39 2006

Date: Sat 10 Jun 2006 - 06:00:17 EST

On Fri, 2006-06-09 at 11:01 +0000, fernando espindola wrote:

> Hi user R,

*>
**> I am try to put degree character in axis x, but don't make this. I have
**> the next code:
**>
**> plot(mot[,5],
**> time1,xlim=c(-45,-10),type="l",yaxt="n",ylab="",col=1,lwd=2,xlab="",xaxt="n")
**>
**> The range of value in axis-x is -45 to -10, this values represents the
**> longitudes positions in space. I try to put 45°S for real value (-45) in
**> the axis-x, and for all elements . Anybody can give an advance in this
**> problems.....
**>
**> Thank for all
*

In general, as Roger noted, see ?plotmath for adding mathematical annotation to R plots.

To do the degree symbol is relatively straightforward, but adding the "S" takes a bit of a trick:

# Create vector of x values

at <- seq(-45, -10, 5)

# Create a mock plot

plot(at, 1:8, xlim = range(at), xaxt = "n")

# Now create a set of plotmath expressions, one for # each value of 'at' using paste() and parse() # The general format for the degrees symbol is x*degree # However, to add the "S" we use the "~" to create # a right and left hand side for the expression and # place the "S" after it. The "~" will not print.L <- parse(text = paste(at, "*degree ~ S", sep = ""))

# Now do the x axis

axis(1, at = at, labels = L)

**HTH,
**
Marc Schwartz

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https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Sat Jun 10 06:11:39 2006

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