[英]How to use cast in reshape package in r
嗨,我有一个这样的数据框:
df <- data.frame(site = c('A','A','B','B','C','A','A'),
state = c('O','F','O','F','O','O','F'),
value = c(5,4,6,7,2,8,9))
看起来像这样
> df
site state value
A O 5
A F 4
B O 6
B F 7
C O 2
A O 8
A F 9
我的目标输出应该是
site F O
A 4 5
B 7 6
C NA 2
A 9 8
有人知道如何实现这一目标吗?
我认为应该与R中的reshape2有关
提前致谢
尝试:
df$id <- with(df, ave(1:nrow(df), site, state, FUN=seq_along))
library(reshape2)
dcast(df, site+id~state, value.var="value")[,-2]
# site F O
#1 A 4 5
#2 A 9 8
#3 B 7 6
#4 C NA 2
要么
library(tidyr)
library(dplyr)
df %>%
spread(state, value) %>%
arrange(id) %>%
select(-id)
# site F O
#1 A 4 5
#2 B 7 6
#3 C NA 2
#4 A 9 8
要么
reshape(df, idvar=c("site", "id"), timevar="state",direction="wide")[,-2]
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