Чтобы осуществить то, что Mykhaylo предложил, я немного изменил Milo's code для того, чтобы позволить предоставление weghts в качестве аргумента, который будет влиять на ширину каждой линии. Этот аргумент необязателен, так как нет смысла обеспечивать весы для последнего слоя. Все это, чтобы визуализировать мое решение до this exercise по нейронным сетям. Я дал бинарные веса (0 или 1), так что строки с нулевым весом вообще не рисуются (чтобы сделать изображение более четким).
from matplotlib import pyplot
from math import cos, sin, atan
import numpy as np
class Neuron():
def __init__(self, x, y):
self.x = x
self.y = y
def draw(self):
circle = pyplot.Circle((self.x, self.y), radius=neuron_radius, fill=False)
pyplot.gca().add_patch(circle)
class Layer():
def __init__(self, network, number_of_neurons, weights):
self.previous_layer = self.__get_previous_layer(network)
self.y = self.__calculate_layer_y_position()
self.neurons = self.__intialise_neurons(number_of_neurons)
self.weights = weights
def __intialise_neurons(self, number_of_neurons):
neurons = []
x = self.__calculate_left_margin_so_layer_is_centered(number_of_neurons)
for iteration in range(number_of_neurons):
neuron = Neuron(x, self.y)
neurons.append(neuron)
x += horizontal_distance_between_neurons
return neurons
def __calculate_left_margin_so_layer_is_centered(self, number_of_neurons):
return horizontal_distance_between_neurons * (number_of_neurons_in_widest_layer - number_of_neurons)/2
def __calculate_layer_y_position(self):
if self.previous_layer:
return self.previous_layer.y + vertical_distance_between_layers
else:
return 0
def __get_previous_layer(self, network):
if len(network.layers) > 0:
return network.layers[-1]
else:
return None
def __line_between_two_neurons(self, neuron1, neuron2, linewidth):
angle = atan((neuron2.x - neuron1.x)/float(neuron2.y - neuron1.y))
x_adjustment = neuron_radius * sin(angle)
y_adjustment = neuron_radius * cos(angle)
line_x_data = (neuron1.x - x_adjustment, neuron2.x + x_adjustment)
line_y_data = (neuron1.y - y_adjustment, neuron2.y + y_adjustment)
line = pyplot.Line2D(line_x_data, line_y_data, linewidth=linewidth)
pyplot.gca().add_line(line)
def draw(self):
for this_layer_neuron_index in range(len(self.neurons)):
neuron = self.neurons[this_layer_neuron_index]
neuron.draw()
if self.previous_layer:
for previous_layer_neuron_index in range(len(self.previous_layer.neurons)):
previous_layer_neuron = self.previous_layer.neurons[previous_layer_neuron_index]
weight = self.previous_layer.weights[this_layer_neuron_index, previous_layer_neuron_index]
self.__line_between_two_neurons(neuron, previous_layer_neuron, weight)
class NeuralNetwork():
def __init__(self):
self.layers = []
def add_layer(self, number_of_neurons, weights=None):
layer = Layer(self, number_of_neurons, weights)
self.layers.append(layer)
def draw(self):
for layer in self.layers:
layer.draw()
pyplot.axis('scaled')
pyplot.show()
if __name__ == "__main__":
vertical_distance_between_layers = 6
horizontal_distance_between_neurons = 2
neuron_radius = 0.5
number_of_neurons_in_widest_layer = 4
network = NeuralNetwork()
# weights to convert from 10 outputs to 4 (decimal digits to their binary representation)
weights1 = np.array([\
[0,0,0,0,0,0,0,0,1,1],\
[0,0,0,0,1,1,1,1,0,0],\
[0,0,1,1,0,0,1,1,0,0],\
[0,1,0,1,0,1,0,1,0,1]])
network.add_layer(10, weights1)
network.add_layer(4)
network.draw()
[graphwiz] (http://www.graphviz.org)? –
Должны ли они быть видимыми в одно и то же время (со значениями)? – Caramiriel
@Caramiriel Да. Существуют ли пакеты, поддерживающие эти потребности? – fishiwhj