| TRES-package | Tensor Regression with Envelope Structure | 
| bat | Bat simulated data | 
| ECD | ECD algorithm for estimating the envelope subspace | 
| EEG | Electroencephalography (EEG) dataset for alcoholism study. | 
| FGfun | The Objective function and its gradient | 
| kroncov | The covariance estimation of tensor normal distribution | 
| manifold1D | Estimate the envelope subspace ('ManifoldOptim' 1D) | 
| manifoldFG | Estimate the envelope subspace ('ManifoldOptim' FG) | 
| MenvU_sim | Generate matrices M and U | 
| oneD_bic | Envelope dimension selection based on 1D-BIC | 
| OptM1D | Estimate the envelope subspace ('OptM' 1D) | 
| OptMFG | Estimate the envelope subspace ('OptM' FG) | 
| OptStiefelGBB | Optimization on Stiefel manifold | 
| plot.Tenv | Plot coefficients and p-value for Tenv object. | 
| PMSE | Prediction and mean squared error. | 
| predict.Tenv | Predict method for Tenv object. | 
| print.summary.Tenv | Summarize method for Tenv object. | 
| simplsMU | SIMPLS-type algorithm for estimating the envelope subspace | 
| square | Square simulated data | 
| std_err | Elementwise standard error. | 
| subspace | The distance between two subspaces. | 
| summary.Tenv | Summarize method for Tenv object. | 
| Tenv_Pval | The p-value and standard error of coefficient in tensor response regression (TRR) model. | 
| TPR | Tensor predictor regression | 
| TPR.fit | Tensor predictor regression | 
| TPRdim | Envelope dimension by cross-validation for tensor predictor regression (TPR). | 
| TPRsim | Generate simulation data for tensor predictor regression (TPR) | 
| TRES | Tensor Regression with Envelope Structure | 
| TRR | Tensor response regression | 
| TRR.fit | Tensor response regression | 
| TRRdim | Envelope dimension selection for tensor response regression (TRR) | 
| TRRsim | Generate simulation data for tensor response regression (TRR) | 
| ttt | Matrix product of two tensors |