Making a circular barplot with a hollow center (aka race track plot)

Question

I was asked to recreate the following style of plot. (Please ignore the question of whether this is a good type of visualization and charitably consider this as adding a colorf

Answer 1

I think an immediate fix is to create some "empty" entries. I'd create internetImportance data.frame like this:

Category <- c("Electronics", "Appliances", "Books", "Music", "Clothing", 
        "Cars", "Food/Beverages", "Personal Hygiene", 
        "Personal Health/OTC", "Hair Care")
Percent <- c(81, 77, 70, 69, 69, 68, 62, 62, 61, 60)

internetImportance <- data.frame(Category,Percent)

len <- 4
df2 <- data.frame(Category = letters[1:len], Percent = rep(0, len), 
                                 Category2 = rep("", len))
internetImportance$Category2 <- 
 paste0(internetImportance$Category," - ",internetImportance$Percent,"%")

# append number to category name
internetImportance <- rbind(internetImportance, df2)

# set factor so it will plot in descending order 
internetImportance$Category <-
    factor(internetImportance$Category, 
    levels=rev(internetImportance$Category))

And then I'd plot ggplot2 with fill=category2 as follows:

ggplot(internetImportance, aes(x = Category, y = Percent,
    fill = Category2)) + 
    geom_bar(width = 0.9, stat="identity") + 
    coord_polar(theta = "y") +
    xlab("") + ylab("") +
    ylim(c(0,100)) +
    ggtitle("Top Product Categories Influenced by Internet") +
    geom_text(data = internetImportance, hjust = 1, size = 3,
              aes(x = Category, y = 0, label = Category2)) +
    theme_minimal() +
    theme(legend.position = "none",
          panel.grid.major = element_blank(),
          panel.grid.minor = element_blank(),
          axis.line = element_blank(),
          axis.text.y = element_blank(),
          axis.text.x = element_blank(),
          axis.ticks = element_blank())

This gives me:

You can add a geom_text(label="GLOBAL", x=.5, y=.5, size=4) + before theme_minimal to add the text GLOBAL.