Logistic Regression (Binary)
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A classification algorithm that uses a sigmoid function.
Classification - differentiates things into different classes, not a continuous value.
Eg 1:- email is spam or not
Eg 2:- recognizing dogs, cats, rats etc from a bunch of animals list
Sigmoid function -
Different cases in sigmoid function:-
The sigmoid function applied into logistic regression equation:-
Note: Logistic regression is binomial when the observed outcome of the dependent variable can have only two values such as 0 and 1 or success and failure.
The cost function in logistic regression equation:-
