[R] Bold greek letters using plotmath

[Jim Price]

I'm trying to annotate some graphics using plotmath and finding out that the
code I'm using isn't bolding the greek letters - it bolds the rest (once I
adjusted the numerics to characters), it's just failing on the greek
characters.

Any suggestions welcomed.

Jim Price.
Cardiome Pharma Corp.


Test code:


plot(1:5, type = 'n')


# The not bold version
text(2, 2:4, cex = 2, labels = do.call(expression, 
	unlist(list('Placebo', lapply(c(3, 6), function(.x) substitute(.x ~~ mu * g
/ kg / hr, list(.x = .x)))), recur = F)))


# The bold version - note that the greek letter doesn't change
text(4, 2:4, cex = 2, labels = do.call(expression, 
	unlist(list(substitute(bold(Placebo)), lapply(as.character(c(3, 6)),
function(.x) substitute(bold(.x ~~ mu * g / kg / hr), list(.x = .x)))),
recur = F)))






> sessionInfo()
R version 2.10.0 (2009-10-26) 
i386-pc-mingw32 

locale:
[1] LC_COLLATE=English_United States.1252  LC_CTYPE=English_United
States.1252   
[3] LC_MONETARY=English_United States.1252 LC_NUMERIC=C                          
[5] LC_TIME=English_United States.1252    

attached base packages:
[1] graphics  grDevices utils     datasets  methods   stats     base     

other attached packages:
[1] foreign_0.8-38     latticeExtra_0.6-1 RColorBrewer_1.0-2 lattice_0.17-26   

loaded via a namespace (and not attached):
[1] grid_2.10.0  tools_2.10.0


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