def statsa():
stats = Statistics(key=lambda ind: sum(ind.fitness.values))
stats.register("avg", numpy.mean)
stats.register("std", numpy.std)
stats.register("min", numpy.min)
stats.register("max", numpy.max)
stats.register("len", len)
return stats
def statsa():
stats = Statistics(key=lambda ind: soft_maximum_worst_case(ind))
stats.register("avg", numpy.mean)
stats.register("std", numpy.std)
stats.register("min", numpy.min)
stats.register("max", numpy.max)
stats.register("len", len)
return stats
def statsa():
stats = Statistics(key=lambda ind: soft_maximum_worst_case(ind))
stats.register("avg", numpy.mean)
stats.register("std", numpy.std)
stats.register("min", numpy.min)
stats.register("max", numpy.max)
stats.register("len", len)
return stats
def Statis_func(stats=None):
if stats is None:
stats = {"fitness_dim_max": ("max",), "dim_is_target": ("sum",)}
func = {"max": np.max, "mean": np.mean, "min": np.min, "std": np.std, "sum": np.sum}
att = {
"fitness": lambda ind: ind.fitness.values[0],
"fitness_dim_max": lambda ind: ind.fitness.values[0] if ind.dim_score else -np.inf,
"fitness_dim_min": lambda ind: ind.fitness.values[0] if ind.dim_score else np.inf,
"dim_is_target": lambda ind: 1 if ind.dim_score else 0,
# special
"coef": lambda ind: score_dim(ind.y_dim, "coef", fuzzy=False),
"integer": lambda ind: score_dim(ind.y_dim, "integer", fuzzy=False),
"length": lambda ind: len(ind),
"height": lambda ind: ind.height,
"h_bgp": lambda ind: ind.h_bgp,
# mutil-target
"weight_fitness": lambda ind: ind.fitness.wvalues,
"weight_fitness_dim": lambda ind: ind.fitness.wvalues if ind.dim_score else -np.inf,
# weight have mul the "-"
}
sa_all = {}
for a, f in stats.items():
if a in att:
a_s = att[a]
elif isinstance(callable, a):
a_s = a
a = str(a).split(" ")[1]
else:
raise TypeError("the key must be in definition or a function")
sa = Statistics(a_s)
if isinstance(f, str):
f = [f, ]
for i, fi in enumerate(f):
assert fi in func
ff = func[fi]
sa.register(fi, ff)
sa_all["Cal_%s" % a] = sa
stats = MultiStatistics(sa_all)
return stats
def train(self, pop = 20, gen = 10):
from deap import algorithms
from deap import base
from deap import creator
from deap import tools
import random
import numpy as np
from deap.tools import Statistics
# creator.create("FitnessMulti", base.Fitness, weights=(1.0, -1.0))
# creator.create("Individual", list, fitness=creator.FitnessMulti)
creator.create("FitnessMax", base.Fitness, weights=(1.0,))
creator.create("Individual", list, fitness=creator.FitnessMax)
toolbox = base.Toolbox()
# Attribute generator
toolbox.register("attr_bool", random.randint, 0, 1)
# Structure initializers
toolbox.register("individual", tools.initRepeat, creator.Individual, toolbox.attr_bool, n=len(self.X.columns))
toolbox.register("population", tools.initRepeat, list, toolbox.individual, n=pop)
# Operator registering
toolbox.register("evaluate", self.eval_classifer)
toolbox.register("mate", tools.cxUniform, indpb=0.1)
toolbox.register("mutate", tools.mutFlipBit, indpb=0.05)
# toolbox.register("select", tools.selNSGA2)
MU, LAMBDA = pop, pop
population = toolbox.population(n=MU)
# hof = tools.ParetoFront()
s = Statistics(key=lambda ind: ind.fitness.values)
s.register("mean", np.mean)
s.register("max", max)
# pop, logbook = algorithms.eaMuPlusLambda(pop, toolbox, mu=MU, lambda_=LAMBDA, cxpb=0.7, mutpb=0.3, ngen=gen, stats=s, halloffame=hof)
for i in range(gen):
offspring = algorithms.varAnd(population, toolbox, cxpb=0.95, mutpb=0.1)
fits = toolbox.map(toolbox.evaluate, offspring)
for fit, ind in zip(fits, offspring):
ind.fitness.values = fit
population = tools.selBest(offspring, int(0.05*len(offspring))) + tools.selTournament(offspring, len(offspring)-int(0.05*len(offspring)), tournsize=3)
# population = toolbox.select(offspring, k=len(population))
print s.compile(population)
top10 = tools.selBest(population, k=10)
print top10
return top10[0]
def create_statistics(fit_index, index):
""" Create deap.tools.Statistics instance for the given name and index
:param fit_index: string
name for the statistic
:param index: int
This is the index of the statistic in a multi-objective fitness tuple
:return: deap.tools.Statistics
"""
stats = Statistics(lambda ind: ind.fitness.values[index])
stats.register("{}_avg".format(fit_index), np.mean)
stats.register("{}_std".format(fit_index), np.std)
stats.register("{}_min".format(fit_index), np.min)
stats.register("{}_max".format(fit_index), np.max)
return stats
def train(self, pop = 20, gen = 10):
from deap import algorithms
from deap import base
from deap import creator
from deap import tools
from deap.tools import Statistics
# import random
from scipy.stats import rv_discrete
# creator.create("FitnessMulti", base.Fitness, weights=(1.0, -1.0))
# creator.create("Individual", list, fitness=creator.FitnessMulti)
creator.create("FitnessMin", base.Fitness, weights=(-1.0,))
creator.create("Individual", list, fitness=creator.FitnessMin)
toolbox = base.Toolbox()
# Attribute generator
custm = rv_discrete(name='custm', values=(self.a_w.index, self.a_w.values))
toolbox.register("attr_int", custm.rvs)
# Structure initializers
toolbox.register("individual", tools.initRepeat, creator.Individual, toolbox.attr_int, n=len(self.s))
toolbox.register("population", tools.initRepeat, list, toolbox.individual, n=pop)
# Operator registering
toolbox.register("evaluate", self.eval_classifer)
toolbox.register("mate", tools.cxUniform, indpb=0.5)
toolbox.register("mutate", tools.mutUniformInt, low=min(self.a.index), up=max(self.a.index), indpb=0.1)
toolbox.register("select", tools.selNSGA2)
MU, LAMBDA = pop, pop
population = toolbox.population(n=MU)
hof = tools.ParetoFront()
s = Statistics(key=lambda ind: ind.fitness.values)
s.register("mean", np.mean)
s.register("min", min)
# pop, logbook = algorithms.eaMuPlusLambda(pop, toolbox, mu=MU, lambda_=LAMBDA, cxpb=0.7, mutpb=0.3, ngen=gen, stats=s, halloffame=hof)
for i in range(gen):
offspring = algorithms.varAnd(population, toolbox, cxpb=0.95, mutpb=0.1)
fits = toolbox.map(toolbox.evaluate, offspring)
for fit, ind in zip(fits, offspring):
ind.fitness.values = fit
population = tools.selBest(offspring, int(0.05*len(offspring))) + tools.selTournament(offspring, len(offspring)-int(0.05*len(offspring)), tournsize=3)
# population = toolbox.select(offspring, k=len(population))
print s.compile(population)
top10 = tools.selBest(population, k=10)
return top10
def __init__(self, bset):
self.bset = bset
pop = [Population.INDIVIDUAL_CLASS(self.bset) for _ in range(self.POPULATION_SIZE)]
super(Population, self).__init__(pop)
self.stats = Statistics(lambda ind: ind.fitness.values)
self.stats.register("avg", np.mean)
self.stats.register("std", np.std)
self.stats.register("min", np.min)
self.stats.register("max", np.max)
self.logbook = Logbook()
self.logbook.header = ['gen'] + self.stats.fields
self.hof = HallOfFame(1)
self.generation = 0
# do an initial evaluation
for ind in self:
ind.fitness.values = ind.evaluate()
def genetic_algorithm(verbose=False, hack=False):
pop = toolbox.population(n=MU)
hof = ParetoFront() # retrieve the best non dominated individuals of the evolution
# Statistics created for compiling four different statistics over the generations
stats = Statistics(lambda ind: ind.fitness.values)
stats.register("avg", np.mean, axis=0) # axis=0: compute the statistics on each objective independently
stats.register("std", np.std, axis=0)
stats.register("min", np.min, axis=0)
stats.register("max", np.max, axis=0)
if hack:
_, logbook, all_generations = \
eaMuPlusLambda_hack(pop, toolbox, MU, LAMBDA, CXPB, MUTPB, NGEN, stats,
halloffame=hof, verbose=verbose)
return pop, stats, hof, logbook, all_generations
else:
_, logbook = \
eaMuPlusLambda(pop, toolbox, MU, LAMBDA, CXPB, MUTPB, NGEN, stats,
halloffame=hof, verbose=verbose)
return pop, stats, hof, logbook
class Population(list):
"""
A collection of individuals
"""
INDIVIDUAL_CLASS = Individual
POPULATION_SIZE = 100
CLONE_BEST = 5
MAX_MATE_ATTEMPTS = 10
MATE_MUTATE_CLONE = (80, 18, 2)
def __init__(self, bset):
self.bset = bset
pop = [Population.INDIVIDUAL_CLASS(self.bset) for _ in range(self.POPULATION_SIZE)]
super(Population, self).__init__(pop)
self.stats = Statistics(lambda ind: ind.fitness.values)
self.stats.register("avg", np.mean)
self.stats.register("std", np.std)
self.stats.register("min", np.min)
self.stats.register("max", np.max)
self.logbook = Logbook()
self.logbook.header = ['gen'] + self.stats.fields
self.hof = HallOfFame(1)
self.generation = 0
# do an initial evaluation
for ind in self:
ind.fitness.values = ind.evaluate()
def select(self, k):
"""Probablistic select *k* individuals among the input *individuals*. The
list returned contains references to the input *individuals*.
:param k: The number of individuals to select.
:returns: A list containing k individuals.
The individuals returned are randomly selected from individuals according
to their fitness such that the more fit the individual the more likely
that individual will be chosen. Less fit individuals are less likely, but
still possibly, selected.
"""
# adjusted pop is a list of tuples (adjusted fitness, individual)
adjusted_pop = [(1.0 / (1.0 + i.fitness.values[0]), i) for i in self]
# normalised_pop is a list of tuples (float, individual) where the float indicates
# a 'share' of 1.0 that the individual deserves based on it's fitness relative to
# the other individuals. It is sorted so the best chances are at the front of the list.
denom = sum([fit for fit, ind in adjusted_pop])
normalised_pop = [(fit / denom, ind) for fit, ind in adjusted_pop]
normalised_pop = sorted(normalised_pop, key=lambda i: i[0], reverse=True)
# randomly select with a fitness bias
# FIXME: surely this can be optimized?
selected = []
for x in range(k):
rand = random.random()
accumulator = 0.0
for share, ind in normalised_pop:
accumulator += share
if rand <= accumulator:
selected.append(ind)
break
if len(selected) == 1:
return selected[0]
else:
return selected
def evolve(self):
"""
Evolve this population by one generation
"""
self.logbook.record(gen=self.generation, **self.stats.compile(self))
self.hof.update(self)
print(self.logbook.stream)
# the best x of the population are cloned directly into the next generation
offspring = self[:self.CLONE_BEST]
# rest of the population clone, mate, or mutate at random
for idx in range(len(self) - self.CLONE_BEST):
# decide how to alter this individual
rand = random.randint(0,100)
for _ in range(0, self.MAX_MATE_ATTEMPTS):
try:
if rand < self.MATE_MUTATE_CLONE[0]: # MATE/CROSSOVER
receiver, contributor = self.select(2)
child = receiver.clone()
child.mate(contributor)
break
elif rand < (self.MATE_MUTATE_CLONE[0] + self.MATE_MUTATE_CLONE[1]): # MUTATE
ind = self.select(1)
child = ind.clone()
child.mutate()
break
else:
child = self.select(1).clone()
break
except BirthError:
continue
# generate new blood when reproduction fails so badly
else:
child = Population.INDIVIDUAL_CLASS(self.bset)
offspring.append(child)
self[:] = offspring
self.generation += 1
# evaluate every individual and sort
for ind in self:
if not len(ind.fitness.values):
ind.fitness.values = ind.evaluate()
self.sort(key=lambda i: i.fitness.values[0])
def mainPart(x_,
y_,
pset,
max_=5,
pop_n=100,
random_seed=2,
cxpb=0.8,
mutpb=0.1,
ngen=5,
tournsize=3,
max_value=10,
double=False,
score=None,
cal_dim=True,
target_dim=None,
inter_add=True,
iner_add=True,
random_add=False,
store=True):
"""
Parameters
----------
target_dim
max_
inter_add
iner_add
random_add
cal_dim
score
double
x_
y_
pset
pop_n
random_seed
cxpb
mutpb
ngen
tournsize
max_value
Returns
-------
"""
if score is None:
score = [r2_score, explained_variance_score]
if cal_dim:
assert all([isinstance(i, Dim) for i in pset.dim_list
]), "all import dim of pset should be Dim object"
random.seed(random_seed)
toolbox = Toolbox()
if isinstance(pset, ExpressionSet):
PTrees = ExpressionTree
Generate = genHalfAndHalf
mutate = mutNodeReplacement
mate = cxOnePoint
elif isinstance(pset, FixedSet):
PTrees = FixedTree
Generate = generate_index
mutate = mutUniForm_index
mate = partial(cxOnePoint_index, pset=pset)
else:
raise NotImplementedError("get wrong pset")
if double:
Fitness_ = creator.create("Fitness_", Fitness, weights=(1.0, 1.0))
else:
Fitness_ = creator.create("Fitness_", Fitness, weights=(1.0, ))
PTrees_ = creator.create("PTrees_",
PTrees,
fitness=Fitness_,
dim=dnan,
withdim=0)
toolbox.register("generate", Generate, pset=pset, min_=1, max_=max_)
toolbox.register("individual",
initIterate,
container=PTrees_,
generator=toolbox.generate)
toolbox.register('population',
initRepeat,
container=list,
func=toolbox.individual)
# def selection
toolbox.register("select_gs", selTournament, tournsize=tournsize)
toolbox.register("select_kbest_target_dim",
selKbestDim,
dim_type=target_dim,
fuzzy=True)
toolbox.register("select_kbest_dimless", selKbestDim, dim_type="integer")
toolbox.register("select_kbest", selKbestDim, dim_type='ignore')
# def mate
toolbox.register("mate", mate)
# def mutate
toolbox.register("mutate", mutate, pset=pset)
if isinstance(pset, ExpressionSet):
toolbox.decorate(
"mate",
staticLimit(key=operator.attrgetter("height"),
max_value=max_value))
toolbox.decorate(
"mutate",
staticLimit(key=operator.attrgetter("height"),
max_value=max_value))
# def elaluate
toolbox.register("evaluate",
calculatePrecision,
pset=pset,
x=x_,
y=y_,
scoring=score[0],
cal_dim=cal_dim,
inter_add=inter_add,
iner_add=iner_add,
random_add=random_add)
toolbox.register("evaluate2",
calculatePrecision,
pset=pset,
x=x_,
y=y_,
scoring=score[1],
cal_dim=cal_dim,
inter_add=inter_add,
iner_add=iner_add,
random_add=random_add)
toolbox.register("parallel",
parallelize,
n_jobs=1,
func=toolbox.evaluate,
respective=False)
toolbox.register("parallel2",
parallelize,
n_jobs=1,
func=toolbox.evaluate2,
respective=False)
pop = toolbox.population(n=pop_n)
haln = 10
hof = HallOfFame(haln)
stats1 = Statistics(lambda ind: ind.fitness.values[0]
if ind and ind.y_dim in target_dim else 0)
stats1.register("max", np.max)
stats2 = Statistics(lambda ind: ind.y_dim in target_dim if ind else 0)
stats2.register("countable_number", np.sum)
stats = MultiStatistics(score1=stats1, score2=stats2)
population, logbook = eaSimple(pop,
toolbox,
cxpb=cxpb,
mutpb=mutpb,
ngen=ngen,
stats=stats,
halloffame=hof,
pset=pset,
store=store)
return population, hof
def compound_update(w, c, p, min=-1, max=1):
mapping_update(w, c, p.mapping)
ordering_update(w, c, p.ordering, min, max)
pass
toolbox = Toolbox()
# toolbox.register("generate", generate, _wf, rm, estimator)
toolbox.register("generate", heft_gen)
toolbox.register("fitness", fitness, _wf, rm, estimator)
toolbox.register("estimate_force", compound_force)
toolbox.register("update", compound_update, W, C)
toolbox.register("G", G)
toolbox.register("kbest", Kbest)
stats = Statistics()
stats.register("min", lambda pop: numpy.min([p.fitness.mofit for p in pop]))
stats.register("avr", lambda pop: numpy.average([p.fitness.mofit for p in pop]))
stats.register("max", lambda pop: numpy.max([p.fitness.mofit for p in pop]))
stats.register("std", lambda pop: numpy.std([p.fitness.mofit for p in pop]))
logbook = Logbook()
logbook.header = ["gen", "G", "kbest"] + stats.fields
def do_exp():
pop, _logbook, best = run_gsa(toolbox, stats, logbook, pop_size, 0, iter_number, None, kbest, ginit, **{"w":W, "c":C})
heft_schedule = run_heft(_wf, rm, estimator)
heft_mapping = schedule_to_position(heft_schedule)
heft_gen = lambda n: [deepcopy(heft_mapping) if random.random() > 1.0 else generate(_wf, rm, estimator, 1)[0] for _ in range(n)]
toolbox = Toolbox()
# toolbox.register("generate", generate, _wf, rm, estimator)
toolbox.register("generate", heft_gen)
toolbox.register("fitness", fitness, _wf, rm, estimator, sorted_tasks)
toolbox.register("force_vector_matrix", force_vector_matrix)
toolbox.register("velocity_and_position", velocity_and_position, beta=0.0)
toolbox.register("G", G)
toolbox.register("kbest", Kbest)
stats = Statistics()
stats.register("min", lambda pop: numpy.min([p.fitness.mofit for p in pop]))
stats.register("avr", lambda pop: numpy.average([p.fitness.mofit for p in pop]))
stats.register("max", lambda pop: numpy.max([p.fitness.mofit for p in pop]))
stats.register("std", lambda pop: numpy.std([p.fitness.mofit for p in pop]))
logbook = Logbook()
logbook.header = ("gen", "G", "kbest", "min", "avr", "max", "std")
pop_size = 40
iter_number = 200
kbest = pop_size
ginit = 2
def train(self, pop=20, gen=10):
from deap import algorithms
from deap import base
from deap import creator
from deap import tools
from deap.tools import Statistics
# import random
from scipy.stats import rv_discrete
# creator.create("FitnessMulti", base.Fitness, weights=(1.0, -1.0))
# creator.create("Individual", list, fitness=creator.FitnessMulti)
creator.create("FitnessMin", base.Fitness, weights=(-1.0, ))
creator.create("Individual", list, fitness=creator.FitnessMin)
toolbox = base.Toolbox()
# Attribute generator
custm = rv_discrete(name='custm',
values=(self.a_w.index, self.a_w.values))
toolbox.register("attr_int", custm.rvs)
# Structure initializers
toolbox.register("individual",
tools.initRepeat,
creator.Individual,
toolbox.attr_int,
n=len(self.s))
toolbox.register("population",
tools.initRepeat,
list,
toolbox.individual,
n=pop)
# Operator registering
toolbox.register("evaluate", self.eval_classifer)
toolbox.register("mate", tools.cxUniform, indpb=0.5)
toolbox.register("mutate",
tools.mutUniformInt,
low=min(self.a.index),
up=max(self.a.index),
indpb=0.1)
toolbox.register("select", tools.selNSGA2)
MU, LAMBDA = pop, pop
population = toolbox.population(n=MU)
hof = tools.ParetoFront()
s = Statistics(key=lambda ind: ind.fitness.values)
s.register("mean", np.mean)
s.register("min", min)
# pop, logbook = algorithms.eaMuPlusLambda(pop, toolbox, mu=MU, lambda_=LAMBDA, cxpb=0.7, mutpb=0.3, ngen=gen, stats=s, halloffame=hof)
for i in range(gen):
offspring = algorithms.varAnd(population,
toolbox,
cxpb=0.95,
mutpb=0.1)
fits = toolbox.map(toolbox.evaluate, offspring)
for fit, ind in zip(fits, offspring):
ind.fitness.values = fit
population = tools.selBest(offspring, int(
0.05 * len(offspring))) + tools.selTournament(
offspring,
len(offspring) - int(0.05 * len(offspring)),
tournsize=3)
# population = toolbox.select(offspring, k=len(population))
print s.compile(population)
top10 = tools.selBest(population, k=10)
return top10
def mainPart(x_, y_, pset, pop_n=100, random_seed=1, cxpb=0.8, mutpb=0.1, ngen=5, alpha=1,
tournsize=3, max_value=10, double=False, score=None, **kargs):
"""
Parameters
----------
score
double
x_
y_
pset
pop_n
random_seed
cxpb
mutpb
ngen
alpha
tournsize
max_value
kargs
Returns
-------
"""
max_ = pset.max_
if score is None:
score = [r2_score, explained_variance_score]
random.seed(random_seed)
toolbox = Toolbox()
if isinstance(pset, PrimitiveSet):
PTrees = ExpressionTree
Generate = genHalfAndHalf
mutate = mutNodeReplacement
mate = cxOnePoint
elif isinstance(pset, FixedPrimitiveSet):
PTrees = FixedExpressionTree
Generate = generate_
mate = partial(cxOnePoint_index, pset=pset)
mutate = mutUniForm_index
else:
raise NotImplementedError("get wrong pset")
if double:
creator.create("Fitness_", Fitness, weights=(1.0, 1.0))
else:
creator.create("Fitness_", Fitness, weights=(1.0,))
creator.create("PTrees_", PTrees, fitness=creator.Fitness_)
toolbox.register("generate_", Generate, pset=pset, min_=None, max_=max_)
toolbox.register("individual", initIterate, container=creator.PTrees_, generator=toolbox.generate_)
toolbox.register('population', initRepeat, container=list, func=toolbox.individual)
# def selection
toolbox.register("select_gs", selTournament, tournsize=tournsize)
# def mate
toolbox.register("mate", mate)
# def mutate
toolbox.register("mutate", mutate, pset=pset)
if isinstance(pset, PrimitiveSet):
toolbox.decorate("mate", staticLimit(key=operator.attrgetter("height"), max_value=max_value))
toolbox.decorate("mutate", staticLimit(key=operator.attrgetter("height"), max_value=max_value))
# def elaluate
toolbox.register("evaluate", calculate, pset=pset, x=x_, y=y_, score_method=score[0], **kargs)
toolbox.register("evaluate2", calculate, pset=pset, x=x_, y=y_, score_method=score[1], **kargs)
stats1 = Statistics(lambda ind: ind.fitness.values[0])
stats = MultiStatistics(score1=stats1, )
stats.register("avg", np.mean)
stats.register("max", np.max)
pop = toolbox.population(n=pop_n)
haln = 5
hof = HallOfFame(haln)
if double:
population, logbook = multiEaSimple(pop, toolbox, cxpb=cxpb, mutpb=mutpb, ngen=ngen, stats=stats, alpha=alpha,
halloffame=hof, pset=pset)
else:
population, logbook = eaSimple(pop, toolbox, cxpb=cxpb, mutpb=mutpb, ngen=ngen, stats=stats,
halloffame=hof, pset=pset)
return population, logbook, hof