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| acoustic | Phonetics acoustic data (complete) |
| acoustic_subset | Phonetics acoustic data (subset) |
| make_summation_matrix | Construct symmetry constraint matrix for bivariate symmetric smoothing. |
| Predict.matrix.symm.smooth | Predict matrix method for symmetric bivariate smooths. |
| smooth.construct.symm.smooth.spec | Symmetric bivariate smooths constructor |
| sparseFLMM | Functional Linear Mixed Models for Irregularly or Sparsely Sampled Data |