Set/get size of maximum run times of some optimisations
N = PRTIME(N)
N : The desired/retrieved maximum run time in seconds of optimisations.
Some routines like the neural network classifiers NEURC, LMNC and BPXNC, and also ADABOOSTC, EMCLUST and the Parzen density estimators execute an optimisation loop until stability or for a maximum number of iterations. Sometimes this takes too much time and early stopping is desired. By PRTIME a global value is set or retrieved that controls the maximum time spent by the optimisation loop.
PRTIME can temporarily be switched off by T = PRTIME(INF) and after some statements restarted by PRTIME(T). See OVERTIME for usage.
On most places a PRWARNING level 2 message is generated when execution is stopped by PRTIME. It does not make much sense to have N < 1, as many routines have an overhead in the order of a second.