How to label the bar plot bars with the label text vertically aligned: 
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I am using the basic function barplot and text, but unable to achieve this. Request help on this. Thank you.
Bar plot labeling on top of bar
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2 Answers
With basic R, use text:
x = rnorm(10, 5, 2)
(d <- barplot(x, ylim = c(0, max(x)+1)))
text(x = d, y = x,
label = round(x, 2), pos = 3, cex = 0.8, col = "red", srt=90, offset = 1)
Some reproducable code would be helpful to give you a more concrete/helpful answers. However, I believe you are looking for the geom_text with the vjust input. You can play around to find exactly what you like. vjust means something like vertical adjustment. Try a vjust of -0.5, 0.5 or whatever to see what works best in your case.
geom_text(aes(label = n), vjust = -0.5, size = 5) ## inserts number on top of a bar
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