split_using_original_data: split_using_original_data
In hhcartr: HHCART(G) - A Reflected Feature Space for CART

This function is in an internal only function. It performs an axis-parallel split on the original data.

split_using_original_data(
  X,
  y,
  most_freq_class,
  split_original,
  n_classes,
  max_features,
  depth
)

`X`	The feature variables of the current node being processed.
`y`	The target variable for the corresponding feature variables.
`most_freq_class`	The most frequently occurring class at the current node.
`split_original`	A flag, TRUE if splitting on original data otherwise FALSE.
`n_classes`	The number of classes in the target variable.
`max_features`	The maximum number of features to consider in the current split.
`depth`	The depth of the current tree.