
Text mining with R (from top keywords to sentiment analysis)
coco
This is a lecture that will teach you step-by-step how to use R to analyze top keywords, wordclouds, sentiment analysis, and topic modeling in text.
초급
R, Web Crawling, Text Mining
Learn how to draw networks using R. Rather than drawing the network itself, we focus on building the shape of the data that will go into the network and how to draw the network nicely.
How to draw a network in R
How to draw a network using Gephi
🙆🏻♀ Learn how to draw networks using R. Rather than drawing the network itself, we focus on structuring the data format that will go into the network and how to draw the network beautifully.🙆🏻♂
Drawing networks using the network package isn't difficult at all. Simply search for "igraph in R" on Google, copy, paste, and run the example code that appears. However, drawing networks using your own data is not as easy. This is because creating the data to be fed into the network function is not easy. This lecture will teach you how to preprocess your own data into network data and use various R language functions to create attractive network plots. This lecture will cover the following topics:
Introducing igraph, the most representative network package in R.
In this lecture, we will draw a network for the purpose of extracting related words to the top keywords in news articles.
Preprocess text data to be fed into the network.
Let's visualize the network using igraph and ggnetwork. We'll also visualize the interaction network plot using visnetwork.
Let's visualize the network using gephi, a network-specific visualization software.
Q. Can I listen without knowing R at all?
A. You should have basic knowledge of R and text mining to make this easier to listen to. 😭😭. I recommend taking the free R programming basics course and the text mining course that I posted.
Who is this course right for?
Anyone who knows how to use R
Anyone who wants to draw a pretty network
Anyone who wants to analyze networks
Need to know before starting?
R Programming Basics
Basic knowledge of text mining
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학부에서는 통계학을 전공하고 산업공학(인공지능) 박사를 받고 여전히 공부중인 백수입니다.
수상
ㆍ 제6회 빅콘테스트 게임유저이탈 알고리즘 개발 / 엔씨소프트상(2018)
ㆍ 제5회 빅콘테스트 대출 연체자 예측 알고리즘개발 / 한국정보통신진흥협회장상(2017)
ㆍ 2016 날씨 빅데이터 콘테스트/ 기상산업 진흥원장상(2016)
ㆍ 제4회 빅콘테스트 보험사기 예측 알고리즘 개발 / 본선진출(2016)
ㆍ 제3회 빅콘테스트 야구 경기 예측 알고리즘 개발 / 미래창조과학부 장관상(2015)
* blog : https://bluediary8.tistory.com
주로 연구하는 분야는 데이터 사이언스, 강화학습, 딥러닝 입니다.
크롤링과 텍스트마이닝은 현재는 취미로 하고있습니다 :)
크롤링을 이용해서 인기있는 커뮤니티 글만 수집해서 보여주는 마롱이라는 앱을 개발하였고
전국의 맛집리스트와 블로그를 수집해서 맛집 추천 앱도 만들었었죠 :) (시원하게 말아먹..)
지금은 인공지능을 연구하는 박사과정생입니다.
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13 lectures ∙ (3hr 18min)
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