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| Build_JTree | Build a hierarchical/wavelet tree of 2-by-2 Jacobi rotations |
| Calc_Energy | A little function calculate the energy of each level |
| flip | a little function which is equal to flipud in matlab,make the matrix"upside-down" |
| Get_C | a function to Get the (1) Covariance matrix (2) correlation matrix |
| JTree_Basis | Calculate the basis for the Jacobi tree algorithm (one or more iterations) |
| JTree_Scores | Calculates scores for the "best K-basis" at each level of the tree |
| Run_JTree | The function computes the basis representation of the matrix at maxlev |
| Score_JTree | The function computes the scores for the best K basis, for each level of the tree |