Logistic Regression
Logistic regression turns clues into a chance, then chooses yes or no.
What it does
Logistic regression turns clues into a chance, then chooses yes or no.
Sigmoid: The S-shaped line • Binary: A choice between two things
How it works
- Add up the clues.
- Turn the score into a percent chance.
- If the chance is high enough, answer yes. Otherwise, answer no.
Uses & Applications
- An email app can ask, “Is this spam or not spam?”
- A school app can predict pass or fail from practice scores.
- A shop can guess whether a visitor may buy something today.
In short
It is used for two-choice decisions, like spam or not spam.
Try it yourself
Spot a message that might be spam
Spam means unwanted junk messages. Teach a sorter using the number of suspicious word clues.
Your turn
Change one setting at a time. Reset example puts everything back.
Explore the sigmoid
Step 1Why this happens