'at' parameter in mtext(.., adj=0, outer=T) (PR#396)
john.maindonald@anu.edu.au
john.maindonald@anu.edu.au
Mon, 10 Jan 2000 02:40:37 +0100 (MET)
Depending on the setting of par()$usr,
the 'at' setting in mtext(.., adj=0, outer=T) may cause the
text to appear in an anomalous position (e. g. in the first
instance below, at the left of the plot region rather than
at 'at=0' in the figure region), or the text may not appear
at all.
If one does not set the 'at' parameter the text appears
(with 'adj=0') on the far left of the plot region. I assume
this is also anomalous; at all events it is the behaviour
that I wished to circumvent.
The function plot.test() demonstrates the behaviour:
plot.test <-
function(xval=0:4, pos=NULL){
oldpar<-par(oma=c(2,0,0,0))
on.exit(par(oldpar))
plot(xval,xval)
if(is.null(pos))pos<-min(xval)
print(pos)
print(par()$usr)
mtext(side=1,line=3.5,"Marginal text",adj=0,at=pos)
mtext(side=1,line=0.5,"Outer text",outer=T, adj=0,at=min(xval))
}
> plot.test(xval=0:4) # "Outer text appears on left of the figure region
[1] 0
[1] -0.16 4.16 -0.16 4.16
> plot.test(xval=20:24) # "Outer text does not appear at all
[1] 20
[1] 19.84 24.16 19.84 24.16
> # Check that at=0 does not work
> plot.test(xval=20:24, pos=0) # "Outer text does not appear at all
[1] 0
[1] 19.84 24.16 19.84 24.16
>
--please do not edit the information below--
Version:
platform = Windows
arch = x86
os = Win32
system = x86, Win32
status =
major = 0
minor = 90.1
year = 1999
month = December
day = 15
language = R
Windows 9x 4.0 (build 1111) B
Search Path:
.GlobalEnv, Autoloads, package:base
John Maindonald email : john.maindonald@anu.edu.au
Statistical Consulting Unit, phone : (6249)3998
c/o CMA, SMS, fax : (6249)5549
John Dedman Mathematical Sciences Building
Australian National University
Canberra ACT 0200
Australia
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