adjustment of expressions with mtext(..., las=2) (PR#823)

[Subject renamed for bug report]

[...]

For example:

        math.names.text <- c("x1^2", "x2^2", "x2%*%x3) # in actual use,
dynamically created.
        math.expressions <- parse(text=math.names.text)
        dotplot(1:3, labels=math.expressions)

[...]

By the way, I notice that when using math expressions as the labels in
dotplot, the positioning of the labels is off to the right (and off the
visible screen). Is this a bug in the way that the size of the math
expressions are computed?

Yes, it looks like a bug. I try to simplify it:

When using mtext(..., las=2, adj=anything), the argument adj doesn't
seem to have any effect:

  plot(1:10)
  mtext("x^2 + x^3", side = 2, las=2, at=3, line=3, adj=0) # works fine
...

  # but here it is not left justified at line=3:
  mtext(expression(x^2 + x^3), side = 2, las=2, at=7, line=3, adj=0) 

Uwe Ligges


--please do not edit the information below--

Version:
 platform = i386-pc-mingw32
 arch = x86
 os = Win32
 system = x86, Win32
 status = 
 major = 1
 minor = 2.1
 year = 2001
 month = 01
 day = 15
 language = R

Windows NT 4.0 (build 1381) Service Pack 6

Search Path:
 .GlobalEnv, package:ctest, Autoloads, package:base

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