code: @Override
      public INDArray arange(double begin, double end, double step) {
          return Nd4j.create(ArrayUtil.toDoubles(ArrayUtil.range((int) begin, (int) end,  (int)step)));
      }
docs: Array of evenly spaced values.
  
  @param begin the begin of the range
  @param end   the end of the range
  @return the range vector