Bar Graph

Want to learn more? I recommend working through: R for Data Science, R Cookbook, and R Graphics Cookbook.

# load the ggplot2 library
library(ggplot2)
# plot BOD$Time and BOD$demand
qplot(BOD$Time, BOD$demand, geom="bar", stat="identity")

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# Convert the x variable to a factor, so that it is treated as discrete
qplot(factor(BOD$Time), BOD$demand, geom="bar", stat="identity")

png