code: @Override
    public <NV extends NumberVector> NV projectRenderToDataSpace(double[] v, NumberVector.Factory<NV> prototype) {
      final int dim = v.length;
      double[] vec = projectRenderToScaled(v);
      // Not calling {@link #projectScaledToDataSpace} to avoid extra copy of
      // vector.
      for(int d = 0; d < dim; d++) {
        vec[d] = scales[d].getUnscaled(vec[d]);
      }
      return prototype.newNumberVector(vec);
    }
docs: Project a vector from rendering space to data space.
  
  @param <NV> Vector type
  @param v vector in rendering space
  @param prototype Object factory
  @return vector in data space