derivative variable

3 years ago · 4ef9efc2f1
parent 4725b93b1e
commit 4ef9efc2f1
1 changed files with 14 additions and 0 deletions
--- a/variable/dv.r
+++ b/variable/dv.r
@ -0,0 +1,14 @@
+install.packages("hflights")
+install.packages("dplyr")
+library(hflights)
+library(dplyr)
+
+str(hflights)
+
+colnames(hflights)
+hflight_df = tbl_df(hflights)
+hflight_df
+
+# gain이라는 컬럼명의 ArrDelay - DepDelay 값의 파생변수 생성
+aa = mutate(hflight_df, gain=ArrDelay-DepDelay)
+aa