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hypothesis, cost, optimizer minimize #1

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iammiori opened this issue Apr 20, 2019 · 0 comments
Open

hypothesis, cost, optimizer minimize #1

iammiori opened this issue Apr 20, 2019 · 0 comments
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@iammiori
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1. hypothesis

weight는 그래프의 각도 , b는 bias
y= wx+b

2. 비용 함수

우리가 구하고자 하는 그래프는 실제 값에서 그래프의 값까지의 차이가 가장 작은 값.

원래 예측한 값 차이 ) 측정값 - 그래프값
= >실제 측정한 값과 예측한 값의 차이가 최소가 되는 W,b 구하고자 하는 것.

=> n이 측정에 따라 여러개가 될수 있기에 평균을 사용

3. Optimizer

cost 함수의 최솟값을 찾는 알고리즘
=> gradient descent

평균제곱오차

@iammiori iammiori added the concept Record Concept label May 15, 2019
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