2.1.3.linearity_forward.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Thu Aug 16 14:04:15 2018

@author: apple
"""

import numpy as np

D = 784  # 数据维度
K = 10  # 类别数
N = 128  # 样本数量

X = np.random.randn(N, D) # 数据矩阵，每行一个样本
W = 0.01 * np.random.randn(D,K)
b = np.zeros((1,K))
scores = np.dot(X, W) + b # 广播机制