It's not new anyway. You see the same behaviour with
boxplot(dat, ylab=quote(X[2]))
and it boils down to the use of do.call("bxp", ...) in the internals.
As a general matter, expression() exists to prevent this sort of confusion,
e.g., in this construction,
> X <- quote(Y+1); bquote(f(.(X)))
Hi,
Is this expected behavior (R-3.6.0)?
dat <- cbind(x = 1:10, y = 10:1)
ylab <- substitute(X[t], list(t = 2))
plot(dat, ylab = ylab) # works (correctly displays ylab)
boxplot(dat, ylab = ylab) # fails
boxplot(dat, ylab = as.expression(ylab)) # works
Thanks & cheers,
M
