Python | Thread tensor nn.sigmoid ()

| | | | | | | | | | | | | | | |

👻 Check our latest review to choose the best laptop for Machine Learning engineers and Deep learning tasks!

The tensorflow.nn module provides support for many basic neural network operations.

One of the many activation functions is the sigmoid function, which is defined as ,

The sigmoid function outputs in the range (0, 1), which makes it ideal for binary classification tasks where we need find the probability that the data belongs to a certain class. The sigmoid function is differentiable at every point, and its derivative turns out to be Since the expression includes a sigmoid function, its value can be reused to speed up backpropagation.

The sigmoid function suffers from the "vanishing gradients" problem as it flattens at both ends, resulting in very small weight changes when propagating back. This can cause the neural network to refuse to learn and get stuck. For this reason, the use of the sigmoid function is superseded by other non-linear functions, such as the rectified linear unit (ReLU).

tf.nn.sigmoid () [alias tf.sigmoid ] provides sigmoid function support in Tensorflow.

Syntax : tf.nn.sigmoid (x, name = None) or tf.sigmoid (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:

# Import Tensorflow library

import tensorflow as tf


# Constant vector of size 6

a = tf.constant ([ 1.0 , - 0.5 , 3.4 , - 2.1 , 0.0 , - 6.5 ], dtype = tf.float32 )


# Using the sigmoid function and
# save result to & # 39; b & # 39;

b = tf.nn.s igmoid (a, name = ’sigmoid’ )


# 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))

Output:

 Input type: Tensor ("Const_1: 0", shape = (6,), dtype = float32) Input: [1. -0.5 3.4000001 - 2.0999999 0. -6.5] Return type: Tensor ("sigmoid: 0", shape = (6,), dtype = float32) Output: [0.7310586 0.37754068 0.96770459 0.10909683 0.5 0.00150118] 

Code # 2: Rendering

# Import Tensorflow library

import tensorflow as tf


# Importing the NumPy library

import numpy as np


# Import matplotlib.pylot function

import matplotlib.pyplot as plt


# Vector size 15 with values ‚Äã‚Äãfrom -5 to 5

a = np.linspace ( - 5 , 5 , 15 )


# Applying the sigmoid function and
# save the result to & # 39; b & # 39;

b = tf.nn.sigmoid (a, name = ’sigmoid’ )


# Initiate from 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.nn.sigmoid" )

plt.xlabel ( "X" )

plt.ylabel ( "Y" )

plt.show ()

Output:

 Input: Input : [-five. -4.28571429 -3.57142857 -2.85714286 -2.14285714 -1.42857143 -0.71428571 0. 0.71428571 1.42857143 2.14285714 2.85714286 3.57142857 4.28571429 5.] Output: [0.00669285 0.01357692 0.02734679 0.05431327 0.10500059 0.19332137 0.32865255 0.5 0.67134745 0.80667863 0.89499941 0.94568673 0.97265321 0.98642308 0.99330715] 

< figure class = aligncenter amp-wp-inline-e407ac51e00eb7ad9e758d070160c9d8>

👻 Read also: what is the best laptop for engineering students?

We hope this article has helped you to resolve the problem. Apart from Python | Thread tensor nn.sigmoid (), check other _thread Python module-related topics.

Want to excel in Python? See our review of the best Python online courses 2023. If you are interested in Data Science, check also how to learn programming in R.

By the way, this material is also available in other languages:



Javier Chamberlet

California | 2023-02-08

Thanks for explaining! I was stuck with Python | Thread tensor nn.sigmoid () for some hours, finally got it done 🤗. Checked yesterday, it works!

Javier Gonzalez

Shanghai | 2023-02-08

Network PHP module is always a bit confusing 😭 Python | Thread tensor nn.sigmoid () is not the only problem I encountered. I just hope that will not emerge anymore

Jan Nickolson

Massachussetts | 2023-02-08

Maybe there are another answers? What Python | Thread tensor nn.sigmoid () exactly means?. Will use it in my bachelor thesis

Shop

Gifts for programmers

Learn programming in R: courses

$FREE
Gifts for programmers

Best Python online courses for 2022

$FREE
Gifts for programmers

Best laptop for Fortnite

$399+
Gifts for programmers

Best laptop for Excel

$
Gifts for programmers

Best laptop for Solidworks

$399+
Gifts for programmers

Best laptop for Roblox

$399+
Gifts for programmers

Best computer for crypto mining

$499+
Gifts for programmers

Best laptop for Sims 4

$

Latest questions

PythonStackOverflow

Common xlabel/ylabel for matplotlib subplots

1947 answers

PythonStackOverflow

Check if one list is a subset of another in Python

1173 answers

PythonStackOverflow

How to specify multiple return types using type-hints

1002 answers

PythonStackOverflow

Printing words vertically in Python

909 answers

PythonStackOverflow

Python Extract words from a given string

798 answers

PythonStackOverflow

Why do I get "Pickle - EOFError: Ran out of input" reading an empty file?

606 answers

PythonStackOverflow

Python os.path.join () method

384 answers

PythonStackOverflow

Flake8: Ignore specific warning for entire file

360 answers

News


Wiki

Python | How to copy data from one Excel sheet to another

Common xlabel/ylabel for matplotlib subplots

Check if one list is a subset of another in Python

How to specify multiple return types using type-hints

Printing words vertically in Python

Python Extract words from a given string

Cyclic redundancy check in Python

Finding mean, median, mode in Python without libraries

Python add suffix / add prefix to strings in a list

Why do I get "Pickle - EOFError: Ran out of input" reading an empty file?

Python - Move item to the end of the list

Python - Print list vertically