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| anneal | Simulated Annealing Search for an optimal k-variable subset |
| gcd.coef | Computes Yanai's GCD in the context of the variable-subset selection problem |
| genetic | Genetic Algorithm searching for an optimal k-variable subset |
| improve | Restricted Local Improvement search for an optimal k-variable subset |
| leaps | A Leaps and Bounds Algorithm for finding the best variable subsets |
| rm.coef | Computes the RM coefficient for variable subset selection |
| rv.coef | Computes the RV-coefficient applied to the variable subset selection problem |
| trim.matrix | Given an ill-conditioned square matrix, deletes rows/columns until a well-conditioned submatrix is obtained. |