public DoubleMatrix2DAssertion isEquivalentTo(double [][] values, double delta)
{
assertThat(actualMatrix).isNotNull();
assertThat(actualMatrix.rows()).as("rows").isEqualTo(values.length);
final Delta deltaObject = Delta.delta(delta);
for (int row = 0; row < values.length; row++)
{
assertThat(actualMatrix.columns()).as("columns")
.isEqualTo(values[row].length);
for (int column = 0; column < values[row].length; column++)