Chapter 11 Default Pie Charts in R

Formula:

pie(x, labels = names(x), radius = 0.8)

• x: a vector of non-negative numerical quantities. The values in x are displayed as the areas of pie slices.
• labels: character strings giving names for the slices.
• radius: radius of the pie circle. If the character strings labeling the slices are long it may be necessary to use a smaller radius.

Basic pie charts: -> pie()

Example-1:

df <- data.frame(
  group = c("Male", "Female", "Child"),
  value = c(35, 45, 20)
  )
df

##    group value
## 1   Male    35
## 2 Female    45
## 3  Child    20

pie(df$value, labels = df$group, radius = 1,col=c("#AA6F39","#2F4073","#2B823A"))

Example-2:

# Change colors
pie(df$value, labels = df$group, radius = 1,
    col = c("#5CCDC9", "#DB62C4", "#FFED73"))

Example-3:

# Pie Chart with Percentages
slices <- c(10, 12, 4, 16, 8) 
lbls <- c("US", "UK", "Australia", "Germany", "France")
pct <- round(slices/sum(slices)*100)
lbls <- paste(lbls, pct) # add percents to labels 
lbls <- paste(lbls,"%",sep="") # ad % to labels 
pie(slices,labels = lbls, col=rainbow(length(lbls)),
   main="Pie Chart of Countries")

Example-4:

# Pie Chart from data frame with Appended Sample Sizes
mytable <- table(iris$Species)
lbls <- paste(names(mytable), "\n", mytable, sep="")
pie(mytable, labels = lbls, 
   main="Pie Chart of Species\n (with sample sizes)")