def __new_perceptorns(self):
self.hidden_pers = []
self.output_pers = []
self.history_weight, self.history_idx = [], 0
if self.dim == 2:
self.history_weight.append([])
# hidden layer
for i in range(self.dim):
p = perceptron.Perceptron(self.dim)
p.set_learning_rate(self.learning_rate)
if self.dim == 2:
self.history_weight[self.history_idx].append(p.weight)
self.hidden_pers.append(p)
# output layer
if self.classes == 2:
p = perceptron.Perceptron(self.dim)
p.set_learning_rate(self.learning_rate)
if self.dim == 2:
self.history_weight[self.history_idx].append(p.weight)
self.output_pers.append(p)
else:
for i in range(self.classes):
p = perceptron.Perceptron(self.dim)
p.set_learning_rate(self.learning_rate)
if self.dim == 2:
self.history_weight[self.history_idx].append(p.weight)
self.output_pers.append(p)
def __init__(self, inputlength):
self.hiddenlayer = [
p.Perceptron(inputlength),
p.Perceptron(inputlength),
p.Perceptron(inputlength),
p.Perceptron(inputlength)
]
self.output = [p.Perceptron(4)]
def runPerceptron(numTrainValues, numTestValues, pixels, tune, useTrainedWeights, info):
"""
runPerceptron() runs the perceptron learning algorithm on the MNIST dataset.
It also prints associated analytics, including the accuracy and time taken
to run.
Keyword arguments:
numTrainValues -- number of training values to train the perceptron
numTestValues -- number of test values to test the trained perceptron
pixels -- number of pixels to chop from the margins of the image
tune -- a boolean for whether to tune to find the optimal number of iterations
useTrainedWeights -- boolean to use pretrained weights
info -- boolean to get information about common classification mistakes
"""
t = time.clock()
perceptronClassifier = perceptron.Perceptron(range(10), 3)
if useTrainedWeights:
perceptronClassifier.useTrainedWeights()
else:
print "Loading Testing Data....\n"
trainingData, trainingLabels, validationData, validationLabels, features = loadFeatures.loadTrainingData(numTrainValues, pixels, tune)
print "Training Perceptron....\n"
perceptronClassifier.train(trainingData, trainingLabels, validationData, validationLabels, tune)
print "Loading Testing Data....\n"
testingData, testingLabels = loadFeatures.loadTestingData(numTestValues, pixels)
print "Testing Perceptron....\n"
classifiedData = perceptronClassifier.classify(testingData)
test(classifiedData, testingLabels, info)
print "Total Time {0}".format(time.clock() - t)
def __init__(self, num_nodes, num_inputs_per_node):
self.num_nodes = num_nodes
# create nodes
self.nodes = []
for i in range(num_nodes):
self.nodes.append(perceptron.Perceptron(num_inputs_per_node))
def init_perceptrons(selected_training_algorithm="RPLA"):
for _ in range(10):
perceptrons.append(pr.Perceptron(5 * 5))
global training_inputs
training_inputs = [np.ravel(n) for n in numbers]
if selected_training_algorithm == "RPLA":
for i in range(20):
labels = np.zeros(20)
labels[i % 10] = 1
labels[i % 10 + 10] = 1
print(f"Wagi perceptronu dla liczby: {i % 10}")
perceptrons[i % 10].train_rpla(training_inputs, labels)
if selected_training_algorithm == "SPLA":
for i in range(20):
labels = np.zeros(20)
labels[i % 10] = 1
labels[i % 10 + 10] = 1
print(f"Wagi perceptronu dla liczby: {i % 10}")
perceptrons[i % 10].train_spla(training_inputs, labels)
if selected_training_algorithm == "PLA":
for i in range(20):
labels = np.zeros(20)
labels[i % 10] = 1
labels[i % 10 + 10] = 1
print(f"Wagi perceptronu dla liczby: {i % 10}")
perceptrons[i % 10].train_pla(training_inputs, labels)
def training():
brain = perceptron.Perceptron()
i = 0
iteration = 1
while( i < iteration ):
for p in points:
inputs = [p.x, p.y, p.bias] #bias = 1
predict = brain.guess(inputs)
#Getting the predicted line by the neural network
yLow, yHigh = brain.guessLine()
animXLine.append([xLowLimit, xHighLimit])
animYLine.append([yLow, yHigh])
#Train the neural network
error = p.target - predict
brain.train(inputs, error)
i = i + 1
#Training done
for p in points:
inputs = [p.x, p.y, p.bias] #bias = 1
predict = brain.guess(inputs)
if ( p.target == 1 ):
ax.plot(p.x, p.y, 'go', label = 'correct', markersize = 10, markeredgecolor = 'k')
else:
ax.plot(p.x, p.y, 'ro', label = 'wrong', markersize = 10, markeredgecolor = 'k')
def __init__(self, name, x_pos, y_pos, x_speed, y_speed, world,
num_directions, learning_rate, epochs, color):
pygame.sprite.Sprite.__init__(self)
self.x_pos = x_pos
self.y_pos = y_pos
self.old_x_pos = x_pos
self.old_y_pos = y_pos
self.x_speed = x_speed
self.y_speed = y_speed
self.score = 0
self.world = world
self.num_directions = num_directions
self.percy = perceptron.Perceptron(
(num_directions * len(self.world.pop_names)), num_directions,
learning_rate, epochs)
self.color = color
self.dir_vector = []
if self.color == 0:
self.image = pygame.image.load("Images/30_30_Red_Square.png")
elif self.color == 1:
self.image = pygame.image.load("Images/30_30_Blue_Square.png")
else:
print("Unknown colour number: ", self.color)
x_size, y_size = self.image.get_rect().size
self.rect = pygame.Rect(x_pos, y_pos, x_size, y_size)
self.mask = pygame.mask.from_surface(self.image)
self.name = name
self.dir = (x_pos, y_pos)
def test_perceptron_or(self, mock):
andTest = []
andTestInnerItem = [0] * 2
andTestItem = [andTestInnerItem]
andTestItem.append(0)
andTest.append(andTestItem)
andTestInnerItem = [0]
andTestInnerItem.append(1)
andTestItem = [andTestInnerItem]
andTestItem.append(1)
andTest.append(andTestItem)
andTestInnerItem = [1]
andTestInnerItem.append(0)
andTestItem = [andTestInnerItem]
andTestItem.append(1)
andTest.append(andTestItem)
andTestInnerItem = [1] * 2
andTestItem = [andTestInnerItem]
andTestItem.append(1)
andTest.append(andTestItem)
perceptron1 = perceptron.Perceptron(.1, .2)
perceptron1.train(andTest)
self.assertNotEqual(None, mock.call_args)
matches = re.match('succeeded after \d+ iterations',
mock.call_args[0][0])
self.assertNotEqual(
re.match('succeeded after \d+ iterations', mock.call_args[0][0]),
None)
def test_full(self):
""" FULL INTEGRATION TEST
This test runs all three trainings required for HW #1
ASSUMPTION:
That you have the MNIST train and test files in current directory
with exact filename below
"""
train_file = 'mnist_train.csv'
test_file = 'mnist_validation.csv'
bias = 1
epochs = 50
p = pt.Perceptron(sizes=[785, 10], train_filename=train_file, test_filename=test_file, bias=bias)
rate = 0.00001
model, accuracy = p.train(rate=rate, epochs=epochs)
assert (model.shape == (785, 10))
assert (accuracy > .80)
rate = 0.001
model, accuracy = p.train(rate=rate, epochs=epochs)
assert (model.shape == (785, 10))
assert (accuracy > .80)
rate = 0.1
model, accuracy = p.train(rate=rate, epochs=epochs)
assert (model.shape == (785, 10))
assert (accuracy > .80)
def when_used_on_a_linearly_seperable_dataset_test():
# Given a perceptron trained on a linearly seperable dataset
number_correct = 0
simulations_to_run = 100
datapoints_per_sim = 100
for i in range(simulations_to_run):
x = numpy.random.uniform(0, 10, size=datapoints_per_sim)
y = .75 * x + 5.0 * numpy.random.normal(
loc=0.0, scale=2.0, size=datapoints_per_sim)
classification = map(lambda t: 1
if t[1] > .75 * t[0] else 0, zip(x, y))
training_dataset = zip(zip(x, y), classification)
the_perceptron = perceptron.Perceptron(
max_iterations=200, bias=0.5,
training_rate=.001) #, training_rate=.01
the_perceptron.train(training_dataset)
# When predicting
test_results = [(the_perceptron.predict(i[0]), i[1])
for i in training_dataset]
number_correct += len(filter(lambda x: x[0] == x[1], test_results))
print number_correct / (1.0 * simulations_to_run * datapoints_per_sim)
assert number_correct / (
1.0 * simulations_to_run * datapoints_per_sim
) >= 0.8, "Then it should have much better than random performance."
def irisTrainSGD(type=0):
X_train, X_test, y_train, y_test = dbload.load_iris_dataset()
if type == 1:
irisPerceptron = AdalineSGD(0.001, 40, 1)
irisPerceptron.fit_sgd(X_train, y_train)
elif type == 0:
irisPerceptron = AdalineGD(0.001, 40)
irisPerceptron.fit_adaline(X_train, y_train)
elif type == 2:
irisPerceptron = AdalineSGD(0.001, 40)
irisPerceptron.fit_mbgd(X_train, y_train)
else:
import time
import perceptron
irisPerceptron = perceptron.Perceptron(0.01, 50)
start = time.time()
irisPerceptron.fit_batch(X_train, y_train)
print("time {:.4f}ms".format((time.time() - start) * 1000))
predict = irisPerceptron.predict(X_test)
errnum = (predict != y_test).sum()
print("Misclassified number {}, Accuracy {:.2f}%".format(errnum, \
(X_test.shape[0] - errnum)/ X_test.shape[0] * 100))
#irisPerceptron.draw_errors()
#irisPerceptron.draw_separate_line(X, y, 'iris')
#irisPerceptron.draw_converge_lines(X, y)
#irisPerceptron.draw_vectors()
#irisPerceptron.draw_costs()
#print("LastCost: %f" % irisPerceptron.costs_[-1])
print('Weights: %s' % irisPerceptron.w_)
def compare_D2():
mean_perception_accuracy = []
mean_svm_accuracy = []
for m in training_sizes:
perceptron_accuracy = 0
svm_accuracy = 0
for i in range(500):
mone = 0
training_points, training_classified = get_points_from_D2(m)
while 1 not in training_classified or -1 not in training_classified:
training_points, training_classified = get_points_from_D2(m)
p = perceptron.Perceptron()
p.fit(training_points, training_classified)
testing_points, testing_classified = get_points_from_D2(K)
for i in range(len(testing_points)):
if p.predict(testing_points[i]) == testing_classified[i]:
mone += 1
temp = mone / K
perceptron_accuracy += temp
svm = SVC(C=1e10, kernel='linear')
svm.fit(training_points, training_classified)
svm_accuracy += svm.score(testing_points, testing_classified)
mean_perception_accuracy.append(perceptron_accuracy / 500)
mean_svm_accuracy.append(svm_accuracy / 500)
plt.plot(training_sizes, mean_perception_accuracy, label="mean_perception")
plt.plot(training_sizes, mean_svm_accuracy, label="mean_svm")
plt.title("Distribution D2")
plt.xlabel("m")
plt.ylabel("mean accuracy")
plt.legend(loc=4)
plt.show()
def gaussian_grid_matrix(ngrids, sigma):
# pairwise formular:
# np.exp(-lg.norm(x-y)**2/(2 * (sigma ** 2)))
# sigma = 1
p = perceptron.Perceptron(0.02)
# n = math.sqrt(npoints)
x1 = np.linspace(-1, 1, ngrids)
x2 = np.linspace(-1, 1, ngrids)
X, Y = np.meshgrid(x1, x2)
X_list = np.concatenate(X)
Y_list = np.concatenate(Y)
XX = np.vstack([X_list, Y_list])
LXX = X_list**2 + Y_list**2
DXX = np.dot(XX.T, XX)
RLXX = np.tile(LXX, (X_list.shape[0], 1))
D = RLXX + RLXX.T - 2 * DXX
K = np.exp(-D / (2 * sigma**2))
return K
def learn(feature_matrix, class_labels):
classifier = perceptron.Perceptron(feature_matrix,
class_labels,
learning_rate=0.1,
iterations=10)
classifier.fit()
return classifier
def test_report(self):
bias = 1
p = pt.Perceptron(sizes=[785, 10], bias=bias)
p.rate = 0.1
p.test_labels = testdata.test_labels_10
predictions = [7, 2, 1, 0, 9, 1, 4, 9, 6, 9]
test_accuracy = 0.80
train_epoch_accuracy = [0.08735, 0.8756, 0.86975, 0.8623666666666666, 0.8714333333333333, 0.8639333333333333, 0.8916666666666667, 0.8642833333333333, 0.8893333333333333, 0.8867333333333334, 0.8793166666666666, 0.8778666666666667, 0.87285, 0.8519, 0.8774333333333333, 0.8725333333333334, 0.8682333333333333, 0.8848666666666667, 0.8672333333333333, 0.88585, 0.8916833333333334, 0.8859833333333333, 0.8844, 0.86395, 0.8768666666666667, 0.87785, 0.8990166666666667, 0.8808166666666667, 0.8971833333333333, 0.8925166666666666, 0.8995666666666666, 0.8684833333333334, 0.8915333333333333, 0.87115, 0.87725, 0.88015, 0.8810666666666667, 0.88425, 0.89875, 0.9054666666666666, 0.8758333333333334, 0.87295, 0.8893333333333333, 0.8859666666666667, 0.8913666666666666, 0.8685666666666667, 0.9002333333333333, 0.8891333333333333, 0.8698666666666667, 0.8714833333333334, 0.8774]
test_epoch_accuracy = [0.0863, 0.877, 0.8631, 0.8585, 0.8631, 0.8531, 0.8861, 0.8558, 0.8825, 0.8776, 0.8684, 0.8656, 0.8702, 0.8418, 0.8654, 0.8673, 0.8595, 0.8746, 0.8555, 0.8757, 0.8786, 0.878, 0.8743, 0.8567, 0.8629, 0.8659, 0.8898, 0.8695, 0.8864, 0.8797, 0.8859, 0.8549, 0.8815, 0.8624, 0.8625, 0.8698, 0.8699, 0.8727, 0.8863, 0.8939, 0.8599, 0.8649, 0.879, 0.8732, 0.8805, 0.8561, 0.8859, 0.876, 0.8581, 0.8615, 0.8651]
conf_matrix = p.report(rate=p.rate, prediction=predictions, test_accuracy=test_accuracy,
train_epoch_accuracy=train_epoch_accuracy, test_epoch_accuracy=test_epoch_accuracy)
# @formatter:off
expected_conf_matrix = np.array \
([
[1,0,0,0,0,0,0,0,0,0],
[0,2,0,0,0,0,0,0,0,0],
[0,0,1,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,0,0,0],
[0,0,0,0,1,0,0,0,0,1],
[0,0,0,0,0,0,1,0,0,0],
[0,0,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,1,0,0],
[0,0,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,0,0,2]
])
#ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all()
assert(np.allclose(conf_matrix, expected_conf_matrix))
def getTrainedNeuron(self):
neuron = perceptron.Perceptron()
trainData = [[1, 1, 1, 0, 1, 0, 0, 1, 0], [1, 0, 1, 1, 1, 1, 1, 0, 1]]
target = [0, 1]
neuron.to_train(trainData, target)
return neuron
def test(eta, n_iter, X, y):
ppn = perceptron.Perceptron(eta=eta, n_iter=n_iter)
ppn.fit(X, y)
plt.plot(range(1, len(ppn.errors_) + 1), ppn.errors_, marker='o')
plt.xlabel('Epochs')
plt.ylabel('Number of errors')
plt.show()
def grade1():
print("=" * 20 + "Grading Problem 1" + "=" * 20)
marks = 0
accs = [0.90, 0.85, 0.70, 0.50]
try:
X_train, Y_train, X_test, Y_test = perceptron.get_data('D2')
assert perceptron.get_features(
X_train[0]).size <= 5, 'Atmost 5 features are allowed'
X_train = np.array([perceptron.get_features(x) for x in X_train])
X_test = np.array([perceptron.get_features(x) for x in X_test])
C = max(np.max(Y_train), np.max(Y_test)) + 1
D = X_train.shape[1]
p = perceptron.Perceptron(C, D)
p.train(X_train, Y_train)
acc = p.eval(X_test, Y_test)
if acc >= accs[0]:
marks += 2.0
elif acc >= accs[1]:
marks += 1.5
elif acc >= accs[2]:
marks += 1.0
elif acc >= accs[3]:
marks += 0.5
except:
print('Error')
print("Marks obtained in Problem 1: ", marks)
return marks
def predict_what_weve_seen_in_the_past_test():
the_perceptron = perceptron.Perceptron()
the_perceptron.train([([0], 0), ([1], 1)])
result = the_perceptron.predict([0])
assert result == 0
result = the_perceptron.predict([1])
assert result == 1
def learn_NAND_with_zero_as_activation_test():
the_perceptron = perceptron.Perceptron()
the_perceptron.train([([1, -1], 1), ([1, 1], 0), ([-1, 1], 1), ([-1,
-1], 1)])
result = the_perceptron.predict([-1, 1])
assert result, "should be true"
result = the_perceptron.predict([1, 1])
assert not result, "should be false"
def carrega_pesos_salvos(self, pesos_salvos):
print(">> Caregando pesos salvos")
for i in range(self.n_classes):
self.camada.append(
perceptron.Perceptron(taxa_aprendizado=self.taxa_aprendizado,
epocas=self.epocas,
bias=self.bias))
self.camada[i].carrega_pesos(pesos_salvos.iloc[i, :].tolist())
def test_classify(self):
classifier = perceptron.Perceptron(self.labels_weights)
fs1 = {"f1": 1.0, "f2": 9.0, "f3":1.0}
fs2 = {"f1": 8.0, "f2": 1.0, "f3":1.0}
fs3 = {"f1": 1.0, "f2": 1.0, "f3":8.0}
self.assertEqual("1", classifier.classify(fs1))
self.assertEqual("2", classifier.classify(fs2))
self.assertEqual("3", classifier.classify(fs3))
def main():
rede = p.Perceptron(taxa_aprendizado=0.1, iteracoes=1000, limiar=0.6)
rede.loadAmostras("and.csv")
rede.treinar()
#teste = [1,0.5,1,0]
#rede.testar(teste, 'Sim', 'Não')
for teste in rede.amostras:
rede.testar(teste, 'Verdadeiro', 'Falso')
def treina(self):
#cria camada de perceptrons
print(">> Inicializando rede")
for i in range(self.n_classes):
self.camada.append(
perceptron.Perceptron(taxa_aprendizado=self.taxa_aprendizado,
epocas=self.epocas,
bias=self.bias))
self.camada[i].inicializa_pesos(len(self.amostras[0]))
#insere 1 no início de cada tupla do conjunto de amostras
for i in range(len(self.amostras)):
self.amostras[i].insert(0, 1)
#calcula erro da época 0 e inicializa o contador de erros
print(">> Erros da epoca 0")
erro_count = 0
for i in tqdm(range(len(self.amostras))):
if (self.testa_rede(self.amostras[i]) != self.saidas[i].index(
max(self.saidas[i]))):
erro_count = erro_count + 1
self.erros.append(erro_count)
#controle de épocas
print(">> Treinando perceptrons")
for epocas_count in range(0, self.epocas):
print("\n>> Epoca " + str(epocas_count + 1) + "/" +
str(self.epocas))
#contador do erro absoluto por epoca de treino
erro_count = 0
#para cada amostra no conjunto de treino
for i in tqdm(range(len(self.amostras))):
#lista dos sinais e somas(potencial de ativação) de cada perceptron para uma dada amostra
lista_sinais = []
for j in range(len(self.camada)):
lista_sinais.append(self.camada[j].sinal(
self.camada[j].soma(self.amostras[i])))
#aplica o a função de apendizado para uma dada amostra
for j in range(len(self.camada)):
if (lista_sinais[j] != self.saidas[i][j]):
self.camada[j].treina(
amostras_treino=self.amostras[i],
gabarito_treino=self.saidas[i][j],
y=lista_sinais[j])
#calcula os erros de uma dada época
for i in tqdm(range(len(self.amostras))):
if (self.testa_rede(self.amostras[i]) != self.saidas[i].index(
max(self.saidas[i]))):
erro_count = erro_count + 1
#carrega os erros computados em uma dada época na lista
self.erros.append(erro_count)
def test_n_tuple_boundedness():
"""
Description
---
tests the raising of the VectorError which occurs when a
n_tuple length is inputed that is not 1 or greater
"""
with pytest.raises(perceptron_errors.VectorError):
perceptron.Perceptron(-np.random.randint(low=0, high=10))
def test_perceptron_taux_apprentissage(e, max_iteration):
df = red_wines
connu = df.drop(['quality'],
axis=1) #Tableau qui contient les données connues
prediction = df[
'quality'] #Tableau qui contient les données à prédire (les classes)
temp = np.empty(
[20,
4]) #Tableau récapitulatif des scores de chaque taux d'apprentissage
i = 0 #variable pour parcourir temp
for j in np.arange(0, 1, 0.05): #Le taux d'apprentissage varie de 0 à 1
temp[i][0] = j #On remplie la colonne contenant le taux d'aprentissage
model = pt.Perceptron(
j, e,
max_iteration) #Le classifieur utilisé est le perceptron créé
#On teste le classifieur avec recall, score f1, accuracy
score = cross_validate(model,
connu,
prediction,
cv=StratifiedKFold(n_splits=10,
random_state=int(
perf_counter() * 100),
shuffle=True),
scoring=dict(recal=make_scorer(recall_score),
f1=make_scorer(f1_score),
accur=make_scorer(accuracy_score)),
return_train_score=False)
recall = score['test_recal'].mean()
temp[i][1] = recall
f1 = score['test_f1'].mean()
temp[i][2] = f1
accuracy = score['test_accur'].mean()
temp[i][3] = accuracy
i = i + 1
#On crée un tableau avec des noms de colonnes et de lignes pour temp pour permettre une meilleure lecture
total = pd.DataFrame(
temp, columns=['taux d apprentissage', 'recall', 'f1', 'accuracy'])
print("\nScore total pour les taux d'apprentissage")
print(total)
print("Le meilleur taux d'apprentissage est : ")
print(total.loc[total['accuracy'].idxmax(), 'taux d apprentissage']
) #On prend le taux d'apprentissage avec le meilleur score accuracy
#On crée un graphique pour représenter l'évolution du score accuracy en fonction du taux d'apprentissage
X = total.loc[:, ['taux d apprentissage']]
y = total.loc[:, ['accuracy']]
plt.title(
"Evolution du score accuracy en fonction du taux d'apprentissage")
plt.plot(X, y) # on crée la courbe
plt.ylabel('score accuracy')
plt.xlabel("taux d'apprentissage")
def test1():
testdata = np.array([[1, 2, 3, 4, 5]])
normalized = normalize_in_range(testdata, (0, 10))
print("data: ", testdata, " and ", normalized)
p = perceptron.Perceptron('test')
print(p.calculate(testdata[0]))
#print(p.calculate(testdata[1]))
print(p.calculate(normalized[0]))
def init_perceptrons():
for i in range(10):
perceptrons.append(pr.Perceptron(10 * 10, i))
global training_inputs
training_inputs = [np.ravel(n) for n in numbers]
for i in range(10):
labels = np.zeros(10)
labels[i % 10] = 1
perceptrons[i % 10].train(np.copy(training_inputs), labels)
def __init__(self, perceptrons):
"""Initializes all variables when the class is made.
Contains the list of layers (a set of perceptrons) which is the network itself"""
self.layer = []
self.perceptron_amount = len(perceptrons)
for i in perceptrons:
self.layer.append(
perceptron.Perceptron(i[0], i[1])
) # i[0] are the weights of each perceptron, i[1] are the biases
def __init__(self, train_data, train_label):
self.perceptrons = []
for i in range(0, len(set(train_label))):
etykiety = np.copy(train_label)
etykiety[(etykiety != i)] = -1
etykiety[(etykiety == i)] = 1
perceptron = per.Perceptron(eta=0.1, n_iter=500)
perceptron.fit(train_data, etykiety)
self.perceptrons.append(perceptron)
