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Basic of Machine Learning
About Machine Learning
Posted by
Gyeongmin Kim
on November 08, 2019 ·
1 min read
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What is Machine Learning
Normal Programming : explicit programming
Muchine Learning : Field of study that gives computers the avility to learn without being explicitly programmed
Supervised Learning
Learning with labeled examples
Most common problem type in ML
Regression
Binary Classification
Multi-label Classification
Unsupervised Learning
Learning with un-labeled data
Linear Regression Hypothesis and Cost
Gradient Descent Algorithm
alpha는 한번에 얼마나 움직일 것인가를 나타낸다. Learning Rate
cost function이 위와 같으면 시작점에 따라 minimize하는 부분이 달라진다.
Convex function은 위와 같은 그래프 형태이다.
In Multi-label
만약 x가 수천이면 너무 복잡해진다. 그래서 Matrix를 사용한다.
Logistic(Regression) Classification
Softmax
결과값의 합이 1이 되도록 하는 함수
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