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[Supervised ML] Cost function/Gradient descent for logistic regression - 9
1. Cost function1.1 IntuitionWe use logistic regression / sigmoid function to estimate the data's label or category. How do we choose w and b?For linear regression, we used squared error cost.Linear regression is a convex form, so we could use standard gradient descent equation to figure out local minimum. Since logistic regression is a non-convex form, it has multiple local minimum. Thus, we ca..
AI/ML Specialization
2023. 7. 31. 17:14