激活函数
Sigmoid
曲线图如下:
实现方法:
python
import tensorflow as tf
import matplotlib.pyplot as plt
import numpy as np
#定义x的取值范围
x = np.linspace(-10,10,100)
#直接使用tensorflow实现
y = tf.nn.sigmoid(x)
#绘图
plt.plot(x,y)
plt.grid()
plt.show()
Tanh(双曲正切曲线)
实现方法:
python
import tensorflow as tf
import matplotlib.pyplot as plt
import numpy as np
#定义x的取值范围
x = np.linspace(-10,10,100)
#直接使用tensorflow实现
y = tf.nn.tanh(x)
#绘图
plt.plot(x,y)
plt.grid()
plt.show()
RELU
实现方法:
python
import tensorflow as tf
import matplotlib.pyplot as plt
import numpy as np
#定义x的取值范围
x = np.linspace(-10,10,100)
#直接使用tensorflow实现
y = tf.nn.relu(x)
#绘图
plt.plot(x,y)
plt.grid()
plt.show()
LeakyRelu
实现方法:
python
import tensorflow as tf
import matplotlib.pyplot as plt
import numpy as np
#定义x的取值范围
x = np.linspace(-10,10,100)
#直接使用tensorflow实现
y = tf.nn.leaky_relu(x)
#绘图
plt.plot(x,y)
plt.grid()
plt.show()
softmax
实现方法:
python
import tensorflow as tf
import matplotlib.pyplot as plt
x = tf.constant([0.2,0.02,0.15,1.3,0.5,0.06,1.1,0.05,3.75])
y = tf.nn.softmax(x)
plt.plot(x,y)
plt.grid()
plt.show()