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_posts/2020-08-17-costom.md
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---
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-title: Writing a New Post
+title:
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author: Steven
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-date: 2019-08-08 14:10:00 +0800
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-categories: [Tutorial]
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-tags: [writing]
+date: 2020-08-17 14:15:47 +0800
+categories: [Data Science]
+tags: [Study]
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-1. Data Crapping
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-2.
+## Data recognition
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+1. Anormaly Detection
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+ - 정의 : Anomaly detection 은 데이터의 이상치를 탐지하는 내용이다.
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+ - 방법 :
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+ 1. k-means or KNN 방식을 사용한다.
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+ 2. 데이터가 normal 정규분포를 따른다고 가정할 때, 데이터의 centeroid 를 계산한다.
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