| automobile | Automobiles data |
| d.boots | Bootstrap estimation for dimension (d) of sufficient dimension reduction subspaces. |
| d.test | Testing methods for selecting dimension of the central mean subspace. |
| dsp | Distance between two subspaces. |
| invFM | Fourier transform approach on inverse dimention reduction method. |
| itdr | Integral transformation Methods of Estimating Sufficient Dimension Reduction Subspaces in Regression. |
| PDB | Planning database published in year 2015. |
| wh | Bootstrap estimation for the bandwidth of the Gaussian kernel density estimation. |
| wx | Bootstrap estimation for the tuning parameter for the predictor variables. |
| wy | Bootstrap estimation for the tuning parameter of the response variable. |