{"id":199,"date":"2018-10-25T21:40:29","date_gmt":"2018-10-25T21:40:29","guid":{"rendered":"https:\/\/spectdata.com\/?p=199"},"modified":"2020-12-15T22:22:42","modified_gmt":"2020-12-15T11:22:42","slug":"how-to-use-ggplot-to-plot-pie-charts-on-a-map","status":"publish","type":"post","link":"https:\/\/spectdata.com\/index.php\/2018\/10\/25\/how-to-use-ggplot-to-plot-pie-charts-on-a-map\/","title":{"rendered":"Using ggplot to plot pie charts on a geographical map"},"content":{"rendered":"

In this post, we would go through the steps to plot pie charts on a world map, just like the one below.<\/p>\n

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Plot showing the leading causes of death in the year 2014 for various countries<\/figcaption><\/figure>\n

This image probably scared you as much as it did to me when I realized I need to create something the same as this. “How am I supposed to do this thing when I’m not even good in R programming, in fact, a newbie?” You’re probably asking this to yourself right now, or you already did. I feel you, but I got you. I struggled so much on doing my first map plot, that’s why I’ll be sharing to you the step-by-step ways on how to do it using ggplot, to save you from all the google searches and trial-and-error.<\/p>\n

With that, we will be answering a specific question using real-world data as we go along these steps.<\/p>\n

“Are there differences in the distribution of causes of death per country?”<\/p>\n

I managed to acquire a decent data about death causes in the world per country from kaggle.com<\/a> which will be used in our illustrations and simulations.<\/p>\n

Prepare the Data<\/strong><\/p>\n

The first thing that we need to do is to make sure that our data is complete, that we have what we need prior to plotting. In this case, we need the data for the death causes per country and, the coordinates of each country. Then, we will load it to our work environment as below.<\/p>\n