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genome_float64.go
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genome_float64.go
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/*
Copyright 2010 Thomas Jager <[email protected]> All rights reserved.
Use of this source code is governed by a BSD-style
license that can be found in the LICENSE file.
Floating point genome. For solving functions for example.
*/
package ga
import (
"fmt"
"rand"
)
type GAFloatGenome struct {
Gene []float64
score float64
Max float64
Min float64
hasscore bool
sfunc func(ga *GAFloatGenome) float64
}
func NewFloatGenome(i []float64, sfunc func(ga *GAFloatGenome) float64, max float64, min float64) *GAFloatGenome {
g := new(GAFloatGenome)
g.Gene = i
g.sfunc = sfunc
g.Max = max
g.Min = min
return g
}
// Partially mapped crossover.
func (a *GAFloatGenome) Crossover(bi GAGenome, p1, p2 int) (GAGenome, GAGenome) {
ca := a.Copy().(*GAFloatGenome)
b := bi.(*GAFloatGenome)
cb := b.Copy().(*GAFloatGenome)
copy(ca.Gene[p1:p2+1], b.Gene[p1:p2+1])
copy(cb.Gene[p1:p2+1], a.Gene[p1:p2+1])
ca.Reset()
cb.Reset()
return ca, cb
}
func (a *GAFloatGenome) Splice(bi GAGenome, from, to, length int) {
b := bi.(*GAFloatGenome)
copy(a.Gene[to:length+to], b.Gene[from:length+from])
a.Reset()
}
func (g *GAFloatGenome) Valid() bool {
//TODO: Make this
return true
}
func (g *GAFloatGenome) Switch(x, y int) {
g.Gene[x], g.Gene[y] = g.Gene[y], g.Gene[x]
g.Reset()
}
func (g *GAFloatGenome) Randomize() {
l := len(g.Gene)
for i := 0; i < l; i++ {
g.Gene[i] = rand.Float64()*g.Max + g.Min
}
g.Reset()
}
func (g *GAFloatGenome) Copy() GAGenome {
n := new(GAFloatGenome)
n.Gene = make([]float64, len(g.Gene))
copy(n.Gene, g.Gene)
n.sfunc = g.sfunc
n.score = g.score
n.Max = g.Max
n.Min = g.Min
n.hasscore = g.hasscore
return n
}
func (g *GAFloatGenome) Len() int { return len(g.Gene) }
func (g *GAFloatGenome) Score() float64 {
if !g.hasscore {
g.score = g.sfunc(g)
g.hasscore = true
}
return g.score
}
func (g *GAFloatGenome) Reset() { g.hasscore = false }
func (g *GAFloatGenome) String() string { return fmt.Sprintf("%v", g.Gene) }