TokyoR #18 Introduction to R Functions and Packages
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TokyoR #18 初めてのR
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TokyoR #18 Introduction to R Functions and Packages
- 1. TOKYO.R #18
- 2. 1. 2. 3. R i. ii. iii. demo()) iv. v. vi. vii. fucntion) viii. 4. 5. Mac Windows
- 3. • : • Twitter :aad34210 • :http://pracmper.blogspot.com/ • : • : • : Web
- 4. • R • R •
- 6. R • • R …
- 7. • • … TokyoR Amazon (¥3,990)
- 8. R - • R http://www.r-project.org/
- 9. R - • ������ R
- 10. R - • … R ������ command + enter
- 11. R - quit() R R • R • R
- 12. R - • iris • R demo() demo(graphics)
- 13. R - • Retern
- 14. R - • • “Iris” iris head(iris , 10) tail(iris , 10)
- 15. R - • • Iris$Sepal.Length Iris[,1] | iris[1,1] head(iris[,1] , 10) Iris[ , ] Iris
- 16. R – • • R • apply apply , , • apply(iris[1:4] , 2 , sum) • apply(iris[1:4] , 2 , mean) • apply(iris[1:4] , 2 , sd) • apply(iris[1:4] , 2 ,quantile)
- 17. R – • • R • apply apply , , • apply(iris[1:4] , 2 , sum) • apply(iris[1:4] , 2 , mean) • apply(iris[1:4] , 2 , sd) • apply(iris[1:4] , 2 ,quantile)
- 18. R – • • tapply() tapply , , • tapply(iris[,1] , iris[,5] , sum) • tapply(iris[,1] , iris[,5] , mean) • tapply(iris[,1] , iris[,5] , sd) • tapply(iris[,1] , iris[,5] , quantile)
- 19. R – • aggregate() • aggregate( , , ) • aggregate(iris[,1:4] , list(name = iris$Species) , sum) • aggregate(iris[,1:4] , list(name = iris$Species) , mean) • aggregate(iris[,1:4] , list(name = iris$Species) , sd) • aggregate(iris[,1:4] , list(name = iris$Species) , quantile)
- 20. R – • • ggplot2 ”plyr” SQL ”sqldf” ■ ggplot2 ■ sqldf ddply(full_list, sqldf SELECT c("Subject","Class"), Species , function(df) COUNT(*) as num return(c(AVERAGE=mean(df FROM $RT)))) iris GROUP BY Species ■ ■ http://cran.r-project.org/web/ http://code.google.com/p/sqldf/ packages/plyr/index.html http://www.slideshare.net/aad34210/ http://plyr.had.co.nz/ tokyo-r-sqldf TokyoR
- 21. R – • sum() , mean() • R Excel • Sum() Sum(iris[,1]) Mean() Mean(iris[,1]) sd() Sd(iris[,1]) Var() Var(iris[,1]) Max() max(iris[,1]) Min() Min(iris[,1]) Rank() rank(iris[,1]) Cor() cor(iris[,1] , iris[, 2])
- 22. R – • • http://cran.r-project.org/doc/contrib/Short-refcard.pdf ������ Math ������ R Cheet Sheet
- 23. R – FUNCTION) • R … • ������ function • judge_value <- function(v) { Judge_value z <- ifelse(v >= 0 , "+" , "-") v 0 print(z) } judge_value(v <- -10) − judge_value(v <- 10) +
- 24. R – FUNCTION) • … • Function()
- 25. R – • R • • R ■ R • • Install.packages() • Vignettes • • CRAN Task View • http://cran.r-project.org/ web/views/ • • http://cran.r- • Twitter Facebook project.org/web/ • Yahoo! packages/zoo/ index.html
- 26. R – • Install.packages() • ggplot2 • install.packages("ggplot2”) • • Library(ggplot2)
- 27. • R • R • • • •
- 28. • 1. CRAN R DL 2. demo() 3. iris , iris$Sepal.length , iris[1,1] , head(iris , 10) 4. apply , aggregate , plyr , sqldf 5. sum() , mean() , sd() … 6. function() 7. install.packages()
- 29. m(___)m