Tensorflow是Google開發的開源機器學習庫。它的應用之一是開發深度神經網絡。
模塊tensorflow.math
為許多基本的數學運算提供支持。函數tf.acosh()
[別名tf.math.acosh
]為Tensorflow中的反雙曲餘弦函數提供支持。它期望輸入在[1,∞)範圍內,並為該範圍之外的任何輸入返回nan。輸入類型為張量,如果輸入包含多個元素,則將計算按元素的反雙曲餘弦值。
用法:tf.acosh(x, name=None) or tf.math.acosh(x, name=None)
參數:
x:以下任何類型的張量:float16,float32,float64,complex64或complex128。
name(可選):操作的名稱。
返回類型:與x具有相同類型的張量。
代碼1:
# Importing the Tensorflow library
import tensorflow as tf
# A constant vector of size 6
a = tf.constant([1.0, 0.5, 3.4, -2.1, 0.0, 6.5],
dtype = tf.float32)
# Applying the acosh function and
# storing the result in 'b'
b = tf.acosh(a, name ='acosh')
# Initiating a Tensorflow session
with tf.Session() as sess:
print('Input type:', a)
print('Input:', sess.run(a))
print('Return type:', b)
print('Output:', sess.run(b))
輸出:
Input type:Tensor("Const:0", shape=(6, ), dtype=float32) Input:[ 1. 0.5 3.4 -2.1 0. 6.5] Return type:Tensor("acosh:0", shape=(6, ), dtype=float32) Output:[0. nan 1.894559 nan nan 2.558979]
代碼2:可視化
# Importing the Tensorflow library
import tensorflow as tf
# Importing the NumPy library
import numpy as np
# Importing the matplotlib.pylot function
import matplotlib.pyplot as plt
# A vector of size 15 with values from 1 to 10
a = np.linspace(1, 10, 15)
# Applying the inverse hyperbolic cosine
# function and storing the result in 'b'
b = tf.acosh(a, name ='acosh')
# Initiating a Tensorflow session
with tf.Session() as sess:
print('Input:', a)
print('Output:', sess.run(b))
plt.plot(a, sess.run(b), color = 'red', marker = "o")
plt.title("tensorflow.acosh")
plt.xlabel("X")
plt.ylabel("Y")
plt.show()
輸出:
Input:[ 1. 1.64285714 2.28571429 2.92857143 3.57142857 4.21428571 4.85714286 5.5 6.14285714 6.78571429 7.42857143 8.07142857 8.71428571 9.35714286 10. ] Output:[0. 1.08055227 1.46812101 1.73714862 1.94591015 2.11724401 2.26282815 2.38952643 2.50174512 2.60249262 2.69391933 2.77761797 2.85480239 2.92641956 2.99322285]
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注:本文由純淨天空篩選整理自vaibhav29498大神的英文原創作品 Python | Tensorflow acosh() method。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。