％ 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 stee

％ 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 stee

COMPDIR computes a search direction in a subspace defined by Z. % [SD,dirType] = compdir(Z,H,gf,nvars,f) returns a search direction for the % subproblem 0.5*Z'*H*Z + Z'*gf. Helper function for NLCONST. SD is Newton