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% COMPDIR Computes a search direction in a subspace defined by Z. % Helper function for NLCONST.

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  • 标      签: Z. direction Computes function

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% COMPDIR Computes a search direction in a subspace defined by Z. % Helper function for NLCONST. % Returns Newton direction if possible. % Returns random direction if gradient is small. % Otherwise, returns steepest descent direction. % If the steepest descent direction is small it computes a negative % curvature direction based on the most negative eigenvalue. % For singular matrices, returns steepest descent even if small.

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