Creating scatter plots with Incanter

One of the most common types of charts is a scatter plot. This helps us visualize the relationship between two numeric variables.

Getting ready

We'll need to list Incanter as a dependency in our Leiningen project.clj file:

(defproject reports "0.1.0-SNAPSHOT"
  :dependencies [[org.clojure/clojure "1.6.0"]
                 [incanter "1.5.5"]])

We'll also require several of Incanter's namespaces into our script or REPL:

(require '[incanter.core :as i]
         '[incanter.charts :as c]
         'incanter.datasets)

Finally, we'll use the iris dataset, which we saw in several recipes in Chapter 9, Clustering, Classifying, and Working with Weka:

 (def iris (incanter.datasets/get-dataset :iris))

How to do it...

For this recipe, we'll create a chart plotting the dimensions of the iris' petals:

1. We'll create the chart, but hang on to the object created so that we can do things with the chart...