Created
March 31, 2020 05:25
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Mechine Learning (Python Implentation)
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from numpy import exp, array, random, dot | |
class neural_network: | |
def __init__(self): | |
random.seed(1) | |
# We model a single neuron, with 3 inputs and 1 output and assign random weight. | |
self.weights = 2 * random.random((3, 1)) - 1 | |
def __sigmoid(self, x): | |
return 1 / (1 + exp(-x)) | |
def train(self, inputs, outputs, num): | |
for iteration in range(num): | |
output = self.think(inputs) | |
error = outputs - output | |
adjustment = dot(inputs.T, error * output*(1-output)) | |
self.weights += adjustment | |
def think(self, inputs): | |
result = self.__sigmoid(dot(inputs, self.weights)) | |
return result | |
network = neural_network() | |
# The training set | |
inputs = array([[1, 1, 1], [1, 0, 1], [0, 1, 1]]) | |
outputs = array([[1, 1, 0]]).T | |
# Training the neural network using the training set. | |
network.train(inputs, outputs, 10000) | |
# Ask the neural network the output | |
print(network.think(array([1, 0, 0]))) |
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