Ignore:
Timestamp:
02/28/18 23:43:57 (2 years ago)
Author:
Maciej Komosinski
Message:

Mutation in the 'fn' encoding respects custom min,max,stddev for each variable

File:
1 edited

Legend:

Unmodified
Added
Removed
  • cpp/frams/genetics/fn/oper_fn.cpp

    r747 r752  
    1111static ParamEntry GENOfnparam_tab[] =
    1212{
    13         { "Genetics: fn", 1, 1, },
    14         { "fn_xover", 0, 0, "Inherited in linear mix crossover", "f 0.5 1.0 0.5", FIELD(xover_proportion), "0.5 => children are averaged parents.\n0.8 => children are only 20% different from parents.\n1.0 => each child is identical to one parent (no crossover).", },
     13        { "Genetics: fn", 1, 4, },
     14        { "fn_xover", 0, 0, "Inherited in linear mix crossover", "f 0.5 1.0 0.9", FIELD(xover_proportion), "0.5 => children are averaged parents.\n0.8 => children are only 20% different from parents.\n1.0 => each child is identical to one parent (no crossover).", },
     15        { "fn_mut_bound_low", 1, 0, "Lower bounds for mutation", "s 0 0 [-1.0]", FIELD(mut_bound_low), "A vector of lower bounds (one real value for each variable)", },
     16        { "fn_mut_bound_high", 1, 0, "Higher bounds for mutation", "s 0 0 [1.0]", FIELD(mut_bound_high), "A vector of higher bounds (one real value for each variable)", },
     17        { "fn_mut_stddev", 1, 0, "Standard deviations for mutation", "s 0 0 [0.1]", FIELD(mut_stddev), "A vector of standard deviations (one real value for each variable)", },
    1518        { 0, },
    1619};
     
    5154        if (values.size() == 0)
    5255                return GENOPER_OPFAIL;
     56        vector<double> bound_low = GenoConv_fn0::stringToVector(mut_bound_low.c_str());
     57        vector<double> bound_high = GenoConv_fn0::stringToVector(mut_bound_high.c_str());
     58        vector<double> stddev = GenoConv_fn0::stringToVector(mut_stddev.c_str());
     59        if (bound_low.size() != bound_high.size() || bound_high.size() != stddev.size() || stddev.size() != values.size())
     60        {
     61                logPrintf("GenoOper_fn", "mutate", LOG_ERROR, "The solution vector, bound vectors, and standard deviation vectors must all have the same number of values");
     62                return GENOPER_OPFAIL;
     63        }
     64
    5365        int which = randomN(values.size());
    54         values[which] = GenoOperators::mutateCreep('f', values[which], -100, 100); //TODO precision 0.001 is forced!
     66        values[which] = GenoOperators::mutateCreep('f', values[which], bound_low[which], bound_high[which], stddev[which], false);
    5567        string saved = GenoConv_fn0::vectorToString(values);
    5668        free(gene);
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