Conventions used

There are a number of text conventions used throughout this book.

CodeInText: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "Mount the downloaded WebStorm-10*.dmg disk image file as another disk in your system."

A block of code is set as follows:

val cv = new CrossValidator()
      .setEstimator(pipeline)
      .setEvaluator(new RegressionEvaluator)
      .setEstimatorParamMaps(paramGrid)
      .setNumFolds(numFolds)

Scala functional code blocks look as follows:

 def variantId(genotype: Genotype): String = {
      val name = genotype.getVariant.getContigName
      val start = genotype.getVariant.getStart
      val end = genotype.getVariant.getEnd
      s"$name:$start:$end"
  }

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

var paramGrid = new ParamGridBuilder()
      .addGrid(dTree.impurity, "gini" :: "entropy" :: Nil)
      .addGrid(dTree.maxBins, 3 :: 5 :: 9 :: 15 :: 23 :: 31 :: Nil)
      .addGrid(dTree.maxDepth, 5 :: 10 :: 15 :: 20 :: 25 :: 30 :: Nil)
      .build()

Any command-line input or output is written as follows:

$ sudo mkdir Bitcoin
$ cd Bitcoin

Bold: Indicates a new term, an important word, or words that you see onscreen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "Select System info from the Administration panel."