Warning Message: Removed 15 rows containing missing values

I am trying to limit Y axis of Bar graph in ggplot2 and it is showing this message.....
Warning message:
Removed 15 rows containing missing values (geom_bar).
What should i do?

Hi there.
It is just telling you that there are some missing values on your data (15 for the specific variables). For the purposes of the plot, you should do nothing :smiley: