Dear R-lister

Could anyone know how to make a multi-line title for a plot with
expression()?
In my plot, the title should be writeen in two lines (because it is two long
for one line) and it should use a mathematical expression. I tried to use
"\n", but "\n" is ignored in expression() call:
hist(diffChangeRequestHintsBeforeAnswering[,4], br = 50, xlab = "Skill
Change in Standard Deviation", main = expression(paste("(a) H&S", F[A],
"\nRequest hint(s)/subtask(s) before first attempt")))

Thanks in advance.

Young-Jin Lee

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