How do I eliminate the first variable to test with the variable t-1? [closed]

Question

How do I eliminate the first variable to test with the variable t-1? [closed]

Navigation

#1 by (1 votes)

2

I import the Excel files but I can not get the varable in R. The lag function deletes the first comment and I can not use the nrow or something. How would I do it? I would like to use it to take the Berenblutt-Webb test

r

asked by anonymous 12.11.2017 / 21:05

1 answer

Target an ull element with class="menus" excluding the others, only one at a time [closed] Break text and store in vector

score 1 · Answer 1

Try the lag function of the dplyr package. It has a default argument that can be used to complete previous values. In this case I used NA .

library(dplyr)

df <- data.frame(
  dia = seq(from = as.Date("2017-01-01"), length.out = 100, by = 1),
  x = 1:100
)


df <- df %>%
  mutate(
    x_lag = lag(x, n = 1, default = NA)
  )

head(df)


         dia x x_lag
1 2017-01-01 1    NA
2 2017-01-02 2     1
3 2017-01-03 3     2
4 2017-01-04 4     3
5 2017-01-05 5     4
6 2017-01-06 6     5