Scalala scatter plot example

ScalalaScatterPlot.scala

import scalala.library.Plotting._
import scalala.tensor.dense.DenseVector
import java.awt.Color
import scalala.library.plotting.GradientPaintScale

val x = DenseVector.randn(10)
val y = DenseVector.randn(10)
val s = DenseVector.rand(10) :/ 5

val labels : PartialFunction[Int,String] =
  Map(1->"Red", 4->"Blue")

val tips : PartialFunction[Int,String] =
  {case i : Int => i.toString}

figure(1)

val literalColors : PartialFunction[Int,Color] =
  Map(1->Color.RED, 4->Color.BLUE) orElse { case x : Int => Color.WHITE }

scatter(x, y, s, literalColors, labels=labels, tips=tips)


figure(2)

val c = DenseVector.rand(10);

val paintScale = GradientPaintScale(0.0, 1.0)

val scaleColors = Map() ++ (0 until c.length).map(i => (i, paintScale(c(i))));

scatter(x, y, s, scaleColors, labels = labels, tips = tips)