按多列

Question

我有很多数据记录要按列名分组。

Name  Surname  value
al     adams    120
al     adams    514
al     bats     220
al     bats     120
bill   cox      440
bill   cox      320
bill   brit     320

我希望按名称和姓氏进行分组（并保留它们），并使用值的总和。 这是我的代码。我没有得到想要的显示。

DT<-base_AA_P1 %>%  select(Name, Surname) %>% group_by(Name, Surname) %>%  summarize(SUM_value = sum(value, na.rm = TRUE))

Answer 1

试试这个：

data = data.frame(Name = c("al","al","al","al","bill","bill","bill"),
                  Surname = c("adams","adams","bats","bats","cox","cox","brit"),
                  value = c(120,514,220,120,440,320,320))


library(dplyr)

data2 = data %>%
  group_by(Name,Surname)%>%
  summarise(new_value = sum(value))

data2

    Name Surname new_value
1     al   adams       634
2     al    bats       340
3   bill    brit       320
4   bill     cox       760

我认为，如果您选择名称和姓氏，您将无法获得所需的最终数据中的值总和。