Another example of plotmath

plotmath is very powerful but also not very simple to use.
See ?plotmath

Here is another example of formatting:

> plot(1:100,main="ABCD",cex.main=1.3)
> a=100; b=10
> mtext(bquote(bold(.(formatC(1.2*a,decimal.mark=",",digits=2,format="f")))~" series "~bold(.(formatC(b, digits=0,format="f")))~" items"))
> text(x=1, y=50, bquote(bold(.(formatC(1.2*a,decimal.mark=",",digits=2,format="f")))~" series "~bold(.(formatC(b, digits=0,format="f")))~" items"), pos=4)

The result is:
Some explanations:
~ is a linker between two objects with a space: text(x=1, y=50, bquote("a"~"b"), pos=4)
* is a linker between two objects without a space: text(x=1, y=50, bquote("a"*"b"), pos=4)
use \" between " to show the " character: text(x=1, y=50, bquote("\"a\""*"\"b\""), pos=4)
The "" are not necessary; objects are treated as characters by default: text(x=1, y=50, bquote(a~b), pos=4)
.(x) will return the value of x: text(x=1, y=50, bquote(.(a)~b), pos=4)
bold(x) will print x in bold: text(x=1, y=50, bquote(bold("a")~b), pos=4)
bold(.(x)) does not work if x is numeric: text(x=1, y=50, bquote(bold(.(a))~b), pos=4)
bold(.(as.character(x))) works instead: text(x=1, y=50, bquote(bold(.(as.character(a)))~b), pos=4)


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