error adding grid.text to ggplot
ggplot2, r
Solution
That's because grid.text is part of grid, not ggplot. Furthermore, grid.text only plots something it doesn't add it to the underlying structure of the ggplot object. You are looking for annotate.
ggplot(test, aes(order, foldchange)) + geom_point() +
annotate(geom = "text", label="a", x=.18, y=.9)
This plot was produced with:
ggplot(test, aes(order, foldchange)) + geom_point() +
annotate(geom = "text", label="a", x=5, y=.9)
because `x = 0.18` wouldn't show.
Problem
I am trying to use `grid.text` in `ggplot2` to add a textbox to my plot. The plot works fine by itself, but when I add the `grid.text` command, I get the error "Don't know how to add o to a plot". If Is use `last_plot()`, I still get the error, but the letter shows up on the graph - BUT will not save with the rest of the plot. data set and commands below: ``` foldchange order 1.583591249 1c 1.973012368 1c 1.339505031 1c 0.776845711 2c 1.004515622 2c 1.225864907 2c 13.27371225 3c 7.599476289 3c 10.74132453 3c 3.347536996 4c 4.286202467 4c 3.612756449 4c 17.40825874 5c 20.61039144 5c ggplot(test, aes(order, foldchange)) + geom_point() #this part works fine + grid.text(label="a", x=.18, y=.9) + #this part gives me the error ``` Thanks in advance!