Hello friends,
I would like to announce a super-pre-alpha release of Dejcartes, a
Clojure wrapper around the JFreeChart charting library. From the readme:
Dejcartes is a Clojure interface to the JFreeChart charting and graphing
library. A simple interface to be sure, but practical for graphing
many data
sources. Dejcartes is mostly a wrapper around the ChartFactory static
methods.
This interface suits Clojure's functional paradigm very well.
Chart supports using native Clojure collections for data sources. This
makes
graphing from Clojure applications very intuitive. Lists, vectors, and
hash-maps are translated into JFreeChart's native data types behind
the scenes
as needed. A demo showing many of the supported functions and Clojure
native data
structures is included and can be run from the command line with "ant
demo". Here
is a brief excerpt:
(require '[com.markmfredrickson.dejcartes :as chart])
;; a simple function for making windows -- wrapper coming soon
(import '(org.jfree.chart chartframe))
(defn make-window [title chart]
(doto (new chartframe title chart)
(.pack)
(.setvisible true)))
; first, some categorical data
(def editor-survey
{2009
{"emacs" 312 "vim" 234 "eclipse" 193 "netbeans" 82 "other" 26}
2008
{"vim" 192 "emacs" 267 "eclipse" 297 "other" 75}})
;; a pie chart of the 2009 data
(make-window "Editor Survey"
(chart/pie "2009 Results" (editor-survey 2009)))
Dejcartes is a young project and is lacking in comprehensive
documentation. The
best reference right now is the demo.clj example code and the
JFreeChart API
documentation. Future improvements will include more documentation, an
Agent
based interface for interacting with chart windows, and a persistent
(read:
non-mutating) interface for annotations and other more powerful chart
features.
Dejcartes is licensed under the GNU Lesser GPL, which is consistent with
JFreeChart's license.
The code can be found at: http://www.markmfredrickson.com/code/
Best wishes,
- Mark Fredrickson
mark.m.fredrick...@gmail.com
http://www.markmfredrickson.com
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