nojhan/eodev
Archived
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

Added a new boolean argument to the ctor of eoBitMutation:

Browse source 
you can now specify a rate-per-bit that will be normalized by the chromSize
This commit is contained in:
evomarc 2001-04-12 05:29:34 +00:00
commit e3834441fd
1 changed files with 5 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

7
eo/src/ga/eoBitOp.h
View file

@ -132,7 +132,8 @@ template<class Chrom> class eoBitMutation: public eoMonOp<Chrom>
* (Default) Constructor. * (Default) Constructor.
* @param _rate Rate of mutation. * @param _rate Rate of mutation.
*/ */
eoBitMutation(const double& _rate = 0.01): rate(_rate) {} eoBitMutation(const double& _rate = 0.01, bool _normalize=false):
rate(_rate), normalize(_normalize) {}
/// The class name. /// The class name.
virtual string className() const { return "eoBitMutation"; } virtual string className() const { return "eoBitMutation"; }
@ -143,9 +144,10 @@ template<class Chrom> class eoBitMutation: public eoMonOp<Chrom>
*/ */
bool operator()(Chrom& chrom) bool operator()(Chrom& chrom)
{ {
double actualRate = (normalize ? rate/chrom.size() : rate);
bool changed_something = false; bool changed_something = false;
for (unsigned i = 0; i < chrom.size(); i++) for (unsigned i = 0; i < chrom.size(); i++)
if (eo::rng.flip(rate)) if (eo::rng.flip(actualRate))
{ {
chrom[i] = !chrom[i]; chrom[i] = !chrom[i];
changed_something = true; changed_something = true;
@ -156,6 +158,7 @@ template<class Chrom> class eoBitMutation: public eoMonOp<Chrom>
private: private:
double rate; double rate;
bool normalize; // divide rate by chromSize
}; };