[R] Substitute in legend

[Peter Dalgaard BSA]

Deepayan Sarkar <deepayan at stat.wisc.edu> writes:

> > legend(1,0.5,as.expression(substitute(hat(theta) == p, list(p = pval))))
> 
> Just out of curiosity: ?legend says 
> 
>   legend: a vector of text values or an 'expression' of length >= 1 to
>           appear in the legend.
> 
> Is an object of mode "call" either ? (is.expression() returns FALSE.) Are they 
> expected to work wherever expressions are supposed to work ?

No, yes. They're not text nor expressions (so technically there's no
bug), but it is easier to construct them with substitute() and they do
generally work like expressions of length 1 in graphs.

-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
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