如何使用 R 表示分类数据

Question

I'm learning now R programming language and I'm trying to plot a categorial variable called codeCountry which has 50 country codes. I saw all over the internet that you can use the function barplot() to do it, the problem is I can't have a good view of all the country codes. I have all my data in a table() object. I have tried to do this:

codeCountry<-table(port$code_country)
barplot(codeCountry, main = "Countries", xlab = "Country Code")

This is the result I get, the problem is I would like to have all the codes avaliables. It is possible to do with R?

Can someone give me some help on this?

Thank you!

Answer 1

My preference is to use ggplot2. A small illustration though.

# toy data
set.seed(1)
country = paste0("AAA", sprintf("%02d", 1:50))
population = sample(50:2000, 50)
df = data.frame(country,  population)
# to graph
library(ggplot2)
ggplot(df, aes(x = country, y = population)) + 
  geom_bar(stat = "identity", fill = "grey80", colour = "black", width = 0.4) +
  theme(axis.text.x=element_text(angle=-45, hjust=0.001)) # "angle" will tilt the labels