R help - Jun 2006 - 10 superscript x lables in log-plot

Hi ListMembers,

I  created a log plot with

nums = c(1:10, seq(20,100, 10), seq(200,1000, 100),
         seq(2000,10000, 1000), seq(20000,100000, 10000),200000)
labl = rep("", length(nums))
labl[1] = "1"; labl[10] = "10"; labl[19] = "100";
labl[28] = "1.000"; labl[37] = "10.000"; labl[46] =
"100.000"

plot(thickness_cm~area_km2, data=dat,
    log="x",
    xlab=c("catchment area [km?]"), xaxt="n",
xlim=c(4,150000),
    ylab=c("thickness [cm]"),ylim=c(0,1000))
axis(1, at = nums, label = labl, las = 2)

however I would like to use lables of the form 10 superscript 5. 
Therefore I tried for example

labl[37]=expression(10^5)

which results in some error messages. Does anybody knows how to solve 
the problem?

Thanks in advance
Thomas

maybe the first example of ?plotmath could be of help.

Best,
Dimitris

----
Dimitris Rizopoulos
Ph.D. Student
Biostatistical Centre
School of Public Health
Catholic University of Leuven

Address: Kapucijnenvoer 35, Leuven, Belgium
Tel: +32/(0)16/336899
Fax: +32/(0)16/337015
Web: http://med.kuleuven.be/biostat/
     http://www.student.kuleuven.be/~m0390867/dimitris.htm


----- Original Message ----- 
From: "Thomas Hoffmann" <thomas.hoffmann at uni-bonn.de>
To: <r-help at stat.math.ethz.ch>
Sent: Tuesday, June 06, 2006 9:17 AM
Subject: [R] 10 superscript x lables in log-plot


Hi ListMembers,

I  created a log plot with

nums = c(1:10, seq(20,100, 10), seq(200,1000, 100),
         seq(2000,10000, 1000), seq(20000,100000, 10000),200000)
labl = rep("", length(nums))
labl[1] = "1"; labl[10] = "10"; labl[19] = "100";
labl[28] = "1.000"; labl[37] = "10.000"; labl[46] =
"100.000"

plot(thickness_cm~area_km2, data=dat,
    log="x",
    xlab=c("catchment area [km?]"), xaxt="n",
xlim=c(4,150000),
    ylab=c("thickness [cm]"),ylim=c(0,1000))
axis(1, at = nums, label = labl, las = 2)

however I would like to use lables of the form 10 superscript 5.
Therefore I tried for example

labl[37]=expression(10^5)

which results in some error messages. Does anybody knows how to solve
the problem?

Thanks in advance
Thomas

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