Apache Spark 2.x Machine Learning Cookbook

How it works...

1. The signatures for this method constructor are (Column-major dense matrix):

DenseMatrix(int numRows, int numCols, double[] values)DenseMatrix(int numRows, int numCols, double[] values, boolean isTransposed)

2. The method inherits from the following which makes their concrete methods available to all routines:

   • interface class java.lang.Object

   • java.io.Serializable

   • Matrix

3. There are several method calls that are of interest:

   1. Generate the diagonal matrix from the supplied values in the vector:

static DenseMatrix(Vector vector) 

1. 2. Create an identity matrix. An identity matrix is a matrix that has diagonals as 1 and any other element as 0:

static eye(int n) 

1. 3. Keep track of whether the matrix is transposed: