Barchart of count of true/false values by group (dodged graphs)

Question

I am rather new in R and ggplot. And I am not sure if what I want is doable.

Here is (a portion of) my data:

> mdf
   Batch     A     B     C              


        

Answer 1

Yes it's possible, you just need to reshape your data first, then you can use position = "dodge" to draw a bar for each key. With tidyr:

library(tidyr)
library(dplyr)
library(ggplot2)

mdf %>% gather(key, value, -Batch) %>%
  ggplot(.,(aes(Batch, as.numeric(value), fill = key))) +
  stat_summary(fun.y = sum, geom = "bar", position = "dodge")