这是我的数据:
structure(list(date = structure(c(19662, 19663, 19664, 19665,
19666), class = "Date"), tmax = c(12, 13, 12, 11, 15)), class = "data.frame", row.names = c(NA,
-5L))
date tmax
2023-11-01 12
2023-11-02 13
2023-11-03 12
2023-11-04 11
2023-11-05 15
想要实现的目标如下:
date tmax tmax_climate
2023-11-01 12 NA
2023-11-01 12 NA
2023-11-01 12 12
2023-11-01 12 13
2023-11-01 12 12
2023-11-02 13 NA
2023-11-02 13 12
2023-11-02 13 13
2023-11-02 13 12
2023-11-02 13 11
2023-11-03 12 12
2023-11-03 12 13
2023-11-03 12 12
2023-11-03 12 11
2023-11-03 12 15
2023-11-04 11 13
2023-11-04 11 12
2023-11-04 11 11
2023-11-04 11 15
2023-11-04 11 NA
2023-11-05 15 12
2023-11-05 15 11
2023-11-05 15 15
2023-11-05 15 NA
2023-11-05 15 NA
基本上我想要的是从前两天获得
tmax
,并在接下来的两天获得tmax
。我已经尝试过 rollapply()
、lead()
和 lag()
,但到目前为止还没有运气。我最好坚持dplyr
。 tmax_climate
中的顺序并不重要(不需要如所需输出那样为 tmax
-1、tmax
、tmax
+1)
一个
dplyr
选项:
library(dplyr)
library(tidyr)
df %>%
mutate(lag1 = lag(tmax),
lead1 = lead(tmax),
current = tmax) %>%
pivot_longer(cols = c(lag1, lead1, current),
values_to = 'tmax_climate') %>%
select(-name)
#> # A tibble: 15 × 3
#> date tmax tmax_climate
#> <date> <dbl> <dbl>
#> 1 2023-11-01 12 NA
#> 2 2023-11-01 12 13
#> 3 2023-11-01 12 12
#> 4 2023-11-02 13 12
#> 5 2023-11-02 13 12
#> 6 2023-11-02 13 13
#> 7 2023-11-03 12 13
#> 8 2023-11-03 12 11
#> 9 2023-11-03 12 12
#> 10 2023-11-04 11 12
#> 11 2023-11-04 11 15
#> 12 2023-11-04 11 11
#> 13 2023-11-05 15 11
#> 14 2023-11-05 15 NA
#> 15 2023-11-05 15 15
在 Base R 中,使用以下内容:
n <- 2
m <- length(df$tmax)
x <- c(rep(NA, n), df$tmax, rep(NA, n))
data.frame(df[rep(seq(m), each=m),],
tmax_climate = x[sequence(rep(m,m), seq(m))],
row.names = NULL)
date tmax tmax_climate
1 2023-11-01 12 NA
2 2023-11-01 12 NA
3 2023-11-01 12 12
4 2023-11-01 12 13
5 2023-11-01 12 12
6 2023-11-02 13 NA
7 2023-11-02 13 12
8 2023-11-02 13 13
9 2023-11-02 13 12
10 2023-11-02 13 11
11 2023-11-03 12 12
12 2023-11-03 12 13
13 2023-11-03 12 12
14 2023-11-03 12 11
15 2023-11-03 12 15
16 2023-11-04 11 13
17 2023-11-04 11 12
18 2023-11-04 11 11
19 2023-11-04 11 15
20 2023-11-04 11 NA
21 2023-11-05 15 12
22 2023-11-05 15 11
23 2023-11-05 15 15
24 2023-11-05 15 NA
25 2023-11-05 15 NA