sigmoid function

Innocent Iguana answered on June 24, 2022 Popularity 10/10 Helpfulness 2/10

answer sigmoid function

related a sigmoid function

related Sigmoid function

sigmoid function

Comment

Sigmoid or logistic function is a step function that calculates the
probability of "(the transpose of θ) times x"
It is used in logistic regression to tell which class a point belongs to.  
Remember what "(the transpose of θ) times x" is?
X is the dataset and θ is the weight-vector or co-efficient for each feature in
the dataset. Each value of θ signifies the importance of each feature in the data. 
When "(the transpose of θ) times x" is large for a point, sigmoid is close to 1.
This means that probability of that point belonging to class 1 is almost 1 (most likely).
When "(the transpose of θ) times x" is small for a point, sigmoid is close to 0.
This means that probability of that point belonging to class 1 is almost 0 (least likely).

def sigmoid_activation(weighted_sum):
    return 1.0 / (1.0 + np.exp(-1 * weighted_sum))

Popularity 10/10 Helpfulness 2/10 Language whatever

Source: Grepper

Tags: function sigmoid whatever

Link to this answer
Share Copy Link

Contributed on Feb 12 2023

Innocent Iguana

0 Answers Avg Quality 2/10

Closely Related Answers

a sigmoid function

Comment

import numpy as np
def sigmoid(x):
    """
    Compute the sigmoid of x

    Arguments:
    x -- A scalar or numpy array of any size

    Return:
    s -- sigmoid(x)
    """
    
    # (≈ 1 line of code)
    # s = 
    # YOUR CODE STARTS HERE
    s=1/(1+np.exp(-x))
    
    # YOUR CODE ENDS HERE
    
    return s

Popularity 10/10 Helpfulness 3/10 Language python

Source: Grepper

Tags: function functio

Link to this answer
Share Copy Link

Contributed on Jun 24 2022

josh.ipynb

0 Answers Avg Quality 2/10

Sigmoid function

Comment

σ(x) = 1 / (1 + e^(-x))

Popularity 10/10 Helpfulness 2/10 Language python

Source: Grepper

Tags: function functio

Link to this answer
Share Copy Link

Contributed on Aug 10 2023

Clean Chinchilla

0 Answers Avg Quality 2/10

sigmoid function

Contents

More Related Answers

sigmoid function

Closely Related Answers

a sigmoid function

Sigmoid function

Grepper

Documentation

Social

Legal

Contact

Oops, You will need to install Grepper and log-in to perform this action.