Differences in the start and end Options of the ts Function and the window Function in R 📂R

Differences in the start and end Options of the ts Function and the window Function in R

Description

In R, you often use the ts() and window() functions when dealing with time series data. ts() is used to create time series data that R can accept, and window() is used to extract a portion of the time series data.

Both functions have options for start and end, and their differences are as follows.

ts()

This is an option for giving indices.

start: Assigns an index to the first element of the data to be made into time series data.
end: Determines up to which element to read. It should not be less than the starting index.

window()

This is an option for following indices.

start: Determines from which element of the time series data to start reading.
end: Determines up to which element of the time series data to read.

Why is the function name `window()`?

The reason for naming the function window() is because, as shown above, it creates a ‘window’ to view only a portion of the entire data. This expression is popular in many fields, not just in time series analysis.

Code

set.seed(150421)
x<-rnorm(30)
y<-ts(x,start=20,end=40); y
window(y,start=30)
 
win.graph(4,4); plot(y,main="왜 하필 윈도우인가?")