Include formatted subscript in mtext?
axis-labels, r, subscript
Solution
In the first instance the paste call is entirely superfluous since the argument is a valid R expression:
mtext(expression( italic("h") ^ italic("2")), side=2, line = 2) # works
In the second instance `paste` is also unnecessary:
mtext(expression( italic("I") [italic("a")] ),side=2, line=2,cex=cexm)
The argument to the plotmath-"[" function needs to be inside the paired `"[]"`-symbols.
Problem
Admittedly I am new to R but I have looked around quite a bit and I can't seem to solve this. For superscript this works lovely ``` mtext(expression(paste( italic("h") ^ italic("2"))), side=2, line = 2, cex=cexm) ``` but when I try to get a subscript using the same approach ``` mtext(expression(paste(italic("I") [] italic("a"))),side=2, line=2,cex=cexm) ``` or ``` mtext(expression(paste(italic("I"), italic(["a"]))),side=2, line=2,cex=cexm) ``` plus several other variations on this theme R keeps telling me that there is an unexpected `[` Any help would be greatly appreciated, apologies if this is addressed elsewhere but I did not succeed in finding it.