public INDArray getRange() {
        if (range == null) {
            try (MemoryWorkspace ws = Nd4j.getMemoryManager().scopeOutOfWorkspaces()) {
                range = upper.sub(lower);
            }
        }
        return range;
    }
public INDArray getRange ( ) { if ( range == null ) { try ( MemoryWorkspace ws = Nd4j . getMemoryManager ( ) . scopeOutOfWorkspaces ( ) ) { range = upper . sub ( lower ) ; } } return range ; }
Get the feature wise
range for the statistics.
Note that this is a lazy getter.
It is only computed when needed.
@return the feature wise range
given the min and max