Scatter problems with group

[AdrianP-]

Hi,

The example of http://lightning-viz.org/visualizations/scatter/ don't run in my environment, because it has several errors:

First:

scala> lgn.scatter(x, y, group=group, size=size)
<console>:37: error: type mismatch;
 found   : Array[Float]
 required: Array[Double]
              lgn.scatter(x, y, group=group, size=size)
                          ^

So you need to change every .nextFloat() to .nextDouble() like this:

val x = Array.fill(100)(Random.nextDouble())
val y = Array.fill(100)(Random.nextDouble())
val group = Array.fill(100)(Random.nextDouble() * 5).map(_.toInt)
val size = Array.fill(100)(Random.nextDouble() * 20 + 5)

and the next error:

scala> lgn.scatter(x, y, group=group, size=size)
<console>:37: error: reassignment to val
              lgn.scatter(x, y, group=group, size=size)
                                     ^

I saw the source code and didn't see any group. What it's missing?