The sigmoid function maps a real number to a value between 0 and 1 using an S-shaped curve.
What Is Sigmoid Function?
The sigmoid function maps a real number to a value between 0 and 1 using an S-shaped curve.
Examples of Sigmoid Function
1
σ(0)=0.5.Formula and Key Points
Formula / rule
σ(x)=1/(1+e^(−x))
- Know the definition and standard notation for Sigmoid Function.
- Be able to recognise or compute sigmoid function in a small example.
- Connect the concept to nearby topics in the same subject before using it in larger CSE problems.
Why This Matters in Computer Science
Used directly in rendering, geometric transforms, optimization and machine-learning models. Common in logistic regression and as an activation or probability-mapping function.
Related Math Terms
Sigmoid Function: Frequently Asked Questions
What is Sigmoid Function?
The sigmoid function maps a real number to a value between 0 and 1 using an S-shaped curve.
Why is Sigmoid Function useful in computer science?
Used directly in rendering, geometric transforms, optimization and machine-learning models. Common in logistic regression and as an activation or probability-mapping function.