Scala Chart Library

scala-chart is a Scala library for creating and working with charts. It wraps JFreeChart, much like scala-swing does with the original javax.swing package. This project is released under the same license as JFreeChart to make them fully license-compatible. Checkout the API.

Example Usage

sbt

libraryDependencies += "com.github.wookietreiber" %% "scala-chart" % "latest.integration"

maven

<dependency>
   <groupId>com.github.wookietreiber</groupId>
   <artifactId>scala-chart_${scala.version}</artifactId>
   <version>latest.integration</version>
</dependency>

Imports

You can import nearly all of the scala-chart functionality (except the views, see below) with the following lines:

import scalax.chart._
import scalax.chart.Charting._

Dataset Conversions

You can use the conversions to convert from ordinary Scala collections to the datasets used by JFreeChart:

val data    = Seq((1,2),(2,4),(3,6),(4,8))
val dataset = data.toXYSeriesCollection("some points")

Chart Factories

These datasets can be used by the chart factories, which differ from the JFreeChart ones in the aspect, that they make heavy use of default arguments, so you have to type as less as possible:

val chart = XYLineChart(dataset)

The first argument is always the dataset which is the only required argument. For better readability of your own code, you should name the other arguments:

val chart = XYLineChart(dataset, title = "My Chart of Some Points")

There are also some enrichments for the charts themselves to display them in a window or save them to disk:

chart.show
chart.saveAsPNG(new java.io.File("/tmp/chart.png"), (1024,768))
chart.saveAsJPEG(new java.io.File("/tmp/chart.jpg"), (1024,768))
chart.saveAsPDF(new java.io.File("/tmp/chart.pdf"), (1024,768))

Implicits

There are also implicit conversions / views available, but they are not contained by the above imports, because of ambiguity issues which may arise with implicit conversions. There are different imports available for different kinds of datasets, e.g.:

import scalax.chart.views.XYDatasetViews._
val data = Seq((1,2),(2,4),(3,6),(4,8))
val chart = XYLineChart(data, title = "My Chart of Some Points")

Import these with care, it's most likely better to use the explicit conversions as shown above.

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