问题描述
temp = data.frame ( group=c('a','b','c'),fruits = c('apple','orange','none'),days=c('mon','tues','wed') )
reshape2::dcast(temp,days ~ group,value.var=c ( "fruits") )
days a b c
1 mon apple <NA> <NA>
2 tues <NA> orange <NA>
3 wed <NA> <NA> none
这很好,但是当我这样添加重复的行时。
temp = rbind ( temp,c('a','mon') )
转换将失败,仅显示总数。我真正想要的是这样的东西。
days a b c
1 mon apple;orange <NA> <NA>
2 tues <NA> orange <NA>
3 wed <NA> <NA> none
谢谢!
解决方法
尝试此tidyverse
解决方案。您可以使用paste0()
汇总数据以获取适当的结构,以转换为宽格式:
library(tidyverse)
#Code
temp %>%
group_by(group,days) %>%
summarise(fruits=paste0(fruits,collapse = ';')) %>%
pivot_wider(names_from = group,values_from=fruits)
输出:
# A tibble: 3 x 4
days a b c
<chr> <chr> <chr> <chr>
1 mon apple;orange NA NA
2 tues NA orange NA
3 wed NA NA none