tensorflow梯度下降
2024-08-30 12:52:33
import numpy as np
import tensorflow as tf
import matplotlib.pyplot as plt num_points = 1000
vectors_set = []
for i in range(num_points):
x1 = np.random.normal(0.0, 0.55)
y1 = x1*0.1 + 0.3 + np.random.normal(0.0, 0.03)
vectors_set.append([x1, y1]) x_data = [v[0] for v in vectors_set]
y_data = [v[1] for v in vectors_set] W = tf.Variable(tf.random_uniform([1], -1.0, 1.0), name='W')
b = tf.Variable(tf.zeros([1]), name='b')
y = W*x_data + b loss = tf.reduce_mean(tf.square(y - y_data), name='loss')
optimizer = tf.train.GradientDescentOptimizer(0.5)
train = optimizer.minimize(loss, name='train')
sess = tf.Session()
init = tf.global_variables_initializer()
sess.run(init)
print('W=', sess.run(W), 'b=', sess.run(b), 'loss=', sess.run(loss)) for step in range(20):
sess.run(train)
print('W=', sess.run(W), 'b=', sess.run(b), 'loss=', sess.run(loss)) plt.xlim((-2, 2))
plt.ylim((0.1, 0.5))
plt.scatter(x_data, y_data, c='r')
plt.plot(x_data, sess.run(W)*x_data + sess.run(b))
plt.show()
最新文章
- 基于TCP的网络编程
- MyBatis学习(三)
- Shell 编程基础之变量和环境变量
- @HTML.checkboxFor()用法
- 上下文菜单项(contextMenu)----长按按钮弹出菜单项
- ASP.NET MV3 部署网站 报";Could not load file or assembly ' System.Web.Helpers “ 错的解决方法
- PHP String
- Android Support Library更新到v22.1之AppCompat新特性
- CodeForces 396C 树状数组 + DFS
- 【XSY2759】coin DP 线性插值
- datatables数据渲染自定义
- 29 _react-router说明
- leetcode — longest-substring-without-repeating-characters
- flask框架的教程--虚拟环境的安装[一]
- 论文阅读:Prominent Object Detection and Recognition: A Saliency-based Pipeline
- Linux命令之nl命令
- SystemVerilog 带输出的task
- 怎样删除PeopleSoft进程服务器定义
- eclipse svn插件 设置自动加锁相关
- 用virtualbox虚拟机无法上网的解决方法