Scala: Guide for Data Science Professionals

Customizing the line type

So far, we have just plotted lines using the default settings. Breeze lets us customize how lines are drawn, at least to some extent.

For this example, we will use the height-weight data discussed in Chapter 2, Manipulating Data with Breeze. We will use the Scala shell here for demonstrative purposes, but you will find a program in BreezeDemo.scala that follows the example shell session.

The code examples for this chapter come with a module for loading the data, HWData.scala, that loads the data from the CSVs:

scala> val data = HWData.load
data: HWData = HWData [ 181 rows ]

scala> data.heights
breeze.linalg.DenseVector[Double] = DenseVector(182.0, ...

scala> data.weights
breeze.linalg.DenseVector[Double] = DenseVector(77.0, ...