[R] trouble with paste()

[Peter Dalgaard]

"Charles Annis, P.E." <Charles.Annis at statisticalengineering.com> writes:

> Greetings:
> 
> I'm trying to annotate a plot and find that I cannot correctly paste
> elements.  When I do this:
> 
> text(1.4, 1., paste("conditional density", "\n", "of y, given ",
> expression(x == x[0])), adj=c(0.,0.))
> 
> The expression is not properly displayed.
> 
> Resolving this is not urgent because the workaround is simple:
> 
> text(1.4, 1., paste("conditional density", "\n", "of y, given ", sep=""),
> adj=c(0.,0.))
> text(2.3, 0.94,expression(x == x[0]), adj=c(0.,0.))
> 
> Still, it'd be more convenient if I could learn to do it correctly.
> 
> Any help?

The whole thing needs to be an expression, or you get the consequences
of

> paste("conditional density", "\n", "of y, given ",
+ expression(x == x[0]))
[1] "conditional density \n of y, given  x == x[0]"

I think you're looking for

expression(atop("conditional density", paste("of y, given ", x==x[0])))

-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)             FAX: (+45) 35327907