ClassCastException while using :group-by option for scatter-plot in Incanter

Question

I'm using Incanter 1.9 and I can't get :group-by option in scatter-plot function to work. The statement I am currently trying is:

 (view (scatter-plot :Sepal.Length :Sepal.Width :group-by :Species :data (get-dataset :iris)))

It produces this error:

 ClassCastException java.lang.String cannot be cast to java.lang.Number clojure.lang.RT.doubleCast (RT.java:1222)

What am I doing wrong? Is this the correct usage of :group-by in scatter-plot?

Is there any way you could get the whole stacktrace? Consider using [`(pst)`](https://clojuredocs.org/clojure.repl/pst) in the REPL right after the exception is thrown. — juan.facorro, Feb 25 '15 at 13:51

score 0 · Answer 1 · answered Feb 24 '15 at 17:22

0

This is the correct usage of :group-by. What you test exactly comes from scatter-plot documentation. The example works fine with release 1.5.6 (master).

The release 1.9 is still under development. I did some digging and there had been changes on the way datasets are built and there are some impacts in scatter-plot.

The best is maybe to work with the release 1.5.6.

answered Feb 24 '15 at 17:22

T.Gounelle

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I'm using 1.9 because I require the core.matrix integration with Incanter – Rinu Boney Feb 25 '15 at 12:25

ClassCastException while using :group-by option for scatter-plot in Incanter

1 Answers1