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/ back_propagation.py
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January 9, 2022 16:27
Back propagation neural network for Iris data set (4 input nodes, and 3 output nodes)
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| # coding: utf-8 | |
| import numpy as np | |
| import numpy.linalg as ln | |
| classes = ['Iris-setosa', 'Iris-versicolor', 'Iris-virginica'] | |
| def sigmoid(u): | |
| return 1. / (1. + np.e ** -u) |