Charts are a powerful tool to explore data, and dynamic charts—charts that react to user input—are even more useful.
In this recipe, we'll create a simple chart that graphs the quadratic equation, as well as lets us play with the parameters and see the results in real time.
We'll use the same dependencies in our project.clj
file as we did in the Creating scatter plots with Incanter recipe.
We'll use the following set of imports in our script or REPL:
(require '[incanter.core :as i] '[incanter.charts :as c])
It seems like creating a dynamic chart would be difficult, but it's really not. We just define a dynamic-xy-plot with the variables and relationships that we want, and Incanter will do the rest.
(def d-plot (let [x (range -1 1 0.1)] (c/dynamic-xy-plot [a (range -1.0 1.0 0.1) b (range -1.0 1.0 0.1) c (range -1.0 1.0 0.1)] [x (i/plus (i/mult a x x) (i/mult b x) c)]))) (i/view d-plot)
This presents...