The question’s use of the
xts function is incorrect but it doesn’t really matter since xts cannot represent that sort of data in the first place. xts requires an index class that represents dates or date/times such as
POSIXct but here we have plain numbers. Create a zoo series instead.
library(zoo) # test data INTC <- data.frame(ts = 930:935, close = 18.55) z <- read.zoo(INTC); z ## 930 931 932 933 934 935 ## 18.55 18.55 18.55 18.55 18.55 18.55