Cycles and cross-validation technique

New operations extend the class of problems to be solved and simplify using of the software package.

Replace Cycle operation allows to solve several problems by replacing several strings in the initial problem statement string by new sets of strings. A set of Replace operations for one problem statement can be specified:

Cross Validation operation converts input PSG Matrix in N pairs of complementary sub-matrices. The operation is used for N-fold cross-validation in statistical procedures, such as linear regression. E.g., in linear regression, the first sub-matrix from a pair of sum-matrices is used for fitting and the second sub-matrix is used for validating.