Python | Tensorflow cosh() method

Tensorflow is an open-source machine learning library developed by Google. One of its applications is to develop deep neural networks.

The module tensorflow.math provides support for many basic mathematical operations. Function tf.cosh() [alias tf.math.cosh] provides support for the hyperbolic cosine function in Tensorflow. It expects the input in radian form. The input type is tensor and if the input contains more than one element, element-wise hyperbolic cosine is computed.

Syntax: tf.cosh(x, name=None) or tf.math.cosh(x, name=None)

Parameters:
x: A tensor of any of the following types: float16, float32, float64, complex64, or complex128.
name (optional): The name for the operation.

Return type: A tensor with the same type as that of x.

Code #1:

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# 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 cosh function and
# storing the result in 'b'
b = tf.cosh(a, name ='cosh')
  
# 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))

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Output:


Input type: Tensor("Const_2:0", shape=(6, ), dtype=float32)
Input: [ 1.  -0.5  3.4 -2.1  0.  -6.5]
Return type: Tensor("cosh_1:0", shape=(6, ), dtype=float32)
Output: [  1.5430806   1.127626   14.998738    4.144313    1.        332.5716   ]



 


Code #2: Visualization













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# 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 1 


a = np.linspace(-1, 1, 15) 


  


# Applying the hyperbolic cosine function and 


# storing the result in 'b' 


b = tf.cosh(a, name ='cosh') 


  


# 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.cosh")  


    plt.xlabel("X")  


    plt.ylabel("Y")  


  


    plt.show() 



















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Output:


Input: [-1.         -0.85714286 -0.71428571 -0.57142857 -0.42857143 -0.28571429
 -0.14285714  0.          0.14285714  0.28571429  0.42857143  0.57142857
  0.71428571  0.85714286  1.        ]
Output: [1.54308063 1.39039564 1.26613436 1.16775654 1.09325103 1.04109475
 1.01022145 1.         1.01022145 1.04109475 1.09325103 1.16775654
 1.26613436 1.39039564 1.54308063]



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