Boxplot in R (9 Examples) | Create a Box-and-Whisker Plot in RStudio | boxplot() Function & ggplot2

R code of this video tutorial:

##### Example 1
x ＜- rnorm(1000)
boxplot(x) # Basic boxplot in R

##### Example 2
y ＜- runif(1000) # Create more variables
z ＜- rpois(1000, 3)
group = c(rep("x", 1000),
rep("y", 1000),
rep("z", 1000)))
head(data) # First six rows of data
boxplot(values ~ group, data) # Multiple boxplots in same graph

##### Example 3
boxplot(values ~ group, data, # Change main title and axis labels
main = "My Boxplots",
xlab = "My Boxplot Groups",
ylab = "The Values of My Boxplots")

##### Example 4
boxplot(values ~ group, data, # Horizontal boxplots
horizontal = TRUE)

##### Example 5
boxplot(values ~ group, data, # Thin boxplots
notch = TRUE)

##### Example 6
boxplot(values ~ group, data, # Color of boxplots
col = "red")

##### Example 7
boxplot(values ~ group, data, # Different color for each boxplot
col = c("red", "green", "purple"))

##### Example 8
data2 ＜- data # Replicate data
data2$group ＜- c(rep("x1", 500), rep("x2", 500), # Modify group variable
rep("y1", 500), rep("y2", 500),
rep("z1", 500), rep("z2", 500))
boxplot(values ~ group, data2, # Boxplot with manual positions
col = c("blue", "pink"),
at = c(1, 2, 5, 6, 9, 10))

##### Example 9
library("ggplot2")
ggplot(data2, aes(x = group, y = values, fill = group)) + # Create boxplot chart in ggplot2
geom_boxplot()

[aeroeng]

excellent. Many useful examples. Thanks Herr Statistics Globe!

[bernardrobenson]

Thank you for this excellent tutorial, which would help many students and beginners as I. However, I am probably still unable to create a box plot, and I look forward to your help which must highly be appreciated. I want to build three box plots of these numerical below data each month, but I could not make it
Month Observed SDSM GCMs
Jan 0 4 36
Feb 2.3 1 28
Mar 18 13.8 6
Apr 25 28 89
May 55 67 98
Jun 13 27 2
Jul 15 17 84
Aug. 70 82 130
Sep. 25 31 17
Oct. 14 19 9.3
Nov. 0 5 41
Dec. 2 8 26

[stefos]

Great video. Thank you so much. I have a question. I just created a boxplot (i.e. diel cycle of ozone) and I am wondering, is there a way in order to show the time in x axis only for every 3 hours (i.e. the boxplots will appear normally, but in the x axis the sequence will be 3 6 9 etc.)?

Thank you in advance.

Your vids are really helpful!! Thank you!

[julespeeters]

Hi, how do I add all samples as dots, instead of only the outliers? thanks! great explanation

[nguyenthithuycntynguyenthi]

Thanks for your a helpful video. Could you please show me how to draw a boxplot with 4 different variables and timeline?

[Madush_]

hello, can i know how do linear regression in R-Studio?.Can i Contact you privately??