Title: Talk about Financial Time Series(시계열) Stationarity Author: “Hyun Bong Lee” Get Financial Time Series library(quantmod) ## Warning: package 'quantmod' was built under R version 3.2.2 ## Loading required package: xts ## Loading required package: zoo ## ## Attaching package: 'zoo' ## ## The following objects are masked from 'package:base': ## ## as.Date, as.Date.numeric ## ## Loading require..