Commands/drift

From TNT

DRIFT
Version: 1.1.
Menu path: to do.

DRIFT
   Do tree-drifting, from trees in memory.  Options are: 
     iterations         number of cycles (=iterations) to do 
     numsubs N          number of replacements (i.e. accepted tree 
                        rearrangements) to do in perturbation phase 
     xfactor            makes acceptance of suboptimal trees less likely) 
     [no]autoconst N    number of constrained cycles 
     [no]giveup         percentage of full swap to do in perturbation phase 
     fitdiff            max. difference in absolute fit 
     rfitdiff           max. difference in relative fit 
     findscore N        stop drifting when score N hit 
     [no]equals         alternate perturbed and unperturbed drift cycles 
     [no]fuse NxR       every N iterations, do R rounds of fusing to the 
                        N trees 
     [no]dumpfuse       if fusing fails to produce a better tree, [don't] 
                        dump all the suboptimal trees 
     flat N             run the first N iterations using the relative 
                        fit difference defined with rflat 
     rflat N            max. difference in relative fit difference  
                        for initial iterations 
     flatnumsubs N      number of replacements to do for initial iterations 
   Options set with "drift:[options];" or "drift=[options];" (first case 
   case changes settings only, second case runs). Using "drift:;" current 
   settings are displayed

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Example: tree-drifting with 20 cycles and 3 replacements to do in the perturbation phase