One of R's strengths is its plotting ability. In this recipe, we'll see how to take some data and plot it on a graph. We won't really exercise R's graphic abilities, but this should be enough to get you started.
We must first complete the recipe, Setting up R to talk to Clojure, and have Rserve running. We must also have the Clojure-specific parts of that recipe done and the connection to Rserve made.
We'll need the ToR protocol and the implementations that we defined in the Passing vectors into R recipe.
Also, we'll need access to the java.io.File class:
(import '[java.io File])
This recipe will look a lot like a number of other R-related recipes. We'll create a function that assembles the string with the R expression and then we'll see it in action.
First, we'll define a function to initialize a PNG file for output, plot some data, and save the file, all from R:
(defn r-plot ([data filename] (r-plot data filename *r-cxn*)) ([data filename...