func BenchmarkMutate(b *testing.B) {
headSize := 7
maxArity := 2
tailSize := headSize*(maxArity-1) + 1
numTerminals := 5
numConstants := 5
funcs := []gene.FuncWeight{
{"+", 1},
{"-", 5},
{"*", 5},
}
g1 := gene.RandomNew(headSize, tailSize, numTerminals, numConstants, funcs)
g2 := gene.RandomNew(headSize, tailSize, numTerminals, numConstants, funcs)
g3 := gene.RandomNew(headSize, tailSize, numTerminals, numConstants, funcs)
g4 := gene.RandomNew(headSize, tailSize, numTerminals, numConstants, funcs)
g := New([]*gene.Gene{g1, g2, g3, g4}, "+")
for i := 0; i < b.N; i++ {
g.Mutate(1)
}
}
func TestMutate(t *testing.T) {
headSize := 7
maxArity := 2
tailSize := headSize*(maxArity-1) + 1
numTerminals := 5
funcs := []gene.FuncWeight{
{"Not", 1},
{"And", 5},
{"Or", 5},
}
mux := New([]*gene.Gene{
gene.RandomNew(headSize, tailSize, numTerminals, 0, funcs),
gene.RandomNew(headSize, tailSize, numTerminals, 0, funcs),
gene.RandomNew(headSize, tailSize, numTerminals, 0, funcs),
gene.RandomNew(headSize, tailSize, numTerminals, 0, funcs),
},
"And")
gn := mux.Dup()
mux.Mutate(1)
if err := checkEqual(gn, mux); err == nil {
t.Errorf("TestMutate failed: gn == mux\n")
}
}
// New creates a new random generation of the model.
// fs is a slice of function weights.
// fm is the map of available functions to use for creating the generation of the model.
// numGenomes is the number of genomes to use to populate this generation of the model.
// headSize is the number of head symbols to use in a genome.
// numGenesPerGenome is the number of genes to use per genome.
// numTerminals is the number of terminals (inputs) to use within each gene.
// numConstants is the number of constants (inputs) to use within each gene.
// linkFunc is the linking function used to combine the genes within a genome.
// sf is the scoring (or fitness) function.
func New(fs []gene.FuncWeight, fm functions.FuncMap, numGenomes, headSize, numGenesPerGenome, numTerminals, numConstants int, linkFunc string, sf genome.ScoringFunc) *Generation {
r := &Generation{
Genomes: make([]*genome.Genome, numGenomes, numGenomes),
Funcs: fs,
ScoringFunc: sf,
}
n := maxArity(fs, fm)
tailSize := headSize*(n-1) + 1
for i := range r.Genomes {
genes := make([]*gene.Gene, numGenesPerGenome, numGenesPerGenome)
for j := range genes {
genes[j] = gene.RandomNew(headSize, tailSize, numTerminals, numConstants, fs)
}
r.Genomes[i] = genome.New(genes, linkFunc)
}
return r
}