NA's are being plotted in boxplot ggplot2

r ggplot2 boxplot na
R. Solar picture R. Solar · Jun 17, 2013 · Viewed 37.4k times · Source

I'm trying to plot a v. simple boxplot in ggplot2. I have species richness vs. landuse class. However, I have 2 NA's in my data. For some strange reason, they're being plotted, even when they're being understood as NA's by R. Any suggestion to remove them?

The code I'm using is: 

ggplot(data, aes(x=luse, y=rich))+
  geom_boxplot(mapping = NULL, data = NULL, stat = "boxplot", position = "dodge", outlier.colour = "red", outlier.shape = 16, outlier.size = 2, notch = F, notchwidth = 0.5)+
  scale_x_discrete("luse", drop=T)+
  geom_smooth(method="loess",aes(group=1))

However, the graph includes 2 NA's for luse. Unfortunately I cannot post images, but imagine that a NA bar is being added to my graph.

Answer

בנימן הגלילי picture בנימן הגלילי · Nov 27, 2016

You may try to use the subset() function in the first line of your code

ggplot(data=subset(data, !is.na(luse)), aes(x=luse, y=rich))+

as suggested in: Eliminating NAs from a ggplot

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