New to genetic programming and

[palash hurkat]

I am new to both genetic programming and DEAP so having some trouble to understand both of them . I read the documentation and got the basic idea about genetic programming. However i am having trouble in implementation part. Few questions which i have in my mind -
Q)How to input a multi dimensional array/individual?
Q)What kind of output do i expect here ?

def protectedDiv(left, right):
    try:
        return left / right
    except ZeroDivisionError:
        return 1



pset = gp.PrimitiveSet("MAIN", 1)
pset.addPrimitive(operator.add, 2)
pset.addPrimitive(operator.sub, 2)
pset.addPrimitive(operator.mul, 2)
pset.addPrimitive(protectedDiv, 2)
pset.addPrimitive(operator.neg, 1)
pset.addPrimitive(math.cos, 1)
pset.addPrimitive(math.sin, 1)
pset.addEphemeralConstant("rand101", lambda: random.randint(-1,1))

pset.renameArguments(ARG0='x')

creator.create("FitnessMin", base.Fitness, weights=(-1.0,))
creator.create("Individual", gp.PrimitiveTree, fitness=creator.FitnessMin)


toolbox = base.Toolbox()
toolbox.register("expr", gp.genHalfAndHalf, pset=pset, min_=1, max_=2)
toolbox.register("individual", tools.initIterate, creator.Individual, toolbox.expr)
toolbox.register("population", tools.initRepeat, list, toolbox.individual)
toolbox.register("compile", gp.compile, pset=pset)

def evalSymbReg(individual, points):
    # Transform the tree expression in a callable function
    func = toolbox.compile(expr=individual)
    # Evaluate the mean squared error between the expression
    # and the real function : x**4 + x**3 + x**2 + x
    sqerrors = ((func(x) - x**4 - x**3 - x**2 - x)**2 for x in points)
    return math.fsum(sqerrors) / len(points),



toolbox.register("evaluate", evalSymbReg, points=[x/10. for x in range(-10,10)])
toolbox.register("select", tools.selTournament, tournsize=3)
toolbox.register("mate", gp.cxOnePoint)
toolbox.register("expr_mut", gp.genFull, min_=0, max_=2)
toolbox.register("mutate", gp.mutUniform, expr=toolbox.expr_mut, pset=pset)

toolbox.decorate("mate", gp.staticLimit(key=operator.attrgetter("height"), max_value=17))
toolbox.decorate("mutate", gp.staticLimit(key=operator.attrgetter("height"), max_value=17))

pop = toolbox.population(n=300)

hof = tools.HallOfFame(1)

pop, log = algorithms.eaSimple(pop, toolbox, 0.5, 0.1, 40,halloffame=hof, verbose=True)

[François-Michel De Rainville]

Q)How to input a multi dimensional array/individual?

A) See the gp/numpy example

Q)What kind of output do i expect here ?

A) Where? You have the whole program copy-pasted. The output of the program is usually either the best individuals which are contained in the hall of fame or the final population which is contained in pop.

Regards,

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[mehran zareh]

Hi,

I have the same problem. In the examples I found, only single input case is studied. I would like to know if you have already found any reference for that.

Thanks

Mehran

[François-Michel De Rainville]

There generic programming advanced tutorial state exactly how to have multiple input to GP.

Cheers,

--

[Genetic Programmer]

Hallo,

I have same same problem. Could you please sent me some links?

Best regards,

Richard.

Τη Σάββατο, 3 Δεκεμβρίου 2016 - 5:28:36 μ.μ. UTC, ο χρήστης François-Michel De Rainville έγραψε:

There generic programming advanced tutorial state exactly how to have multiple input to GP.

Cheers,

Le 30 nov. 2016 11:40, "mehran zareh" <mehra...@gmail.com> a écrit :

Hi,

I have the same problem. In the examples I found, only single input case is studied. I would like to know if you have already found any reference for that.

Thanks

Mehran

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[François-Michel De Rainville]

The docs states how to have multiple inputs:

"The first line creates a primitive set. Its arguments are the name of the procedure it will generate ("main") and its number of inputs, 2."

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[Roman Trotsyuk]

Dear François,

I have the same question as other people though I am not novice in GA and GP. May be it is better to make the documentation more clear and provide cross-cutting example then refer to documentation that people already have read and not found the answer? I think ease of use affects proliferation of the library.

Best Regards,

Roman

пятница, 17 ноября 2017 г., 13:04:50 UTC пользователь Genetic Programmer написал: