Italicizing the main word but not the subscripted word

Question

I was wondering how to only make the main word d in my text() to appear in italic, but the subscripted word "unbiased" to remain as ordinary text?

Please see my R code below the following picture.

Here is my R code:

plot(1:10, ty="n")

text( 4, 4.5, bquote(italic(d[(unbiased)])), cex = 5)

Answer 1

Keep the "unbiased" outside italic or use plain:

plot(1:10, ty = "n")
# original
text(5, 4, bquote(italic(d[(unbiased)])), cex = 5)
# use plain
text(5, 6, bquote(italic(d[(plain(unbiased))])), cex = 5)
# keep "unbiased" outside italic
text(5, 8, bquote(italic(d)[(unbiased)]), cex = 5)