如何解决如何在 Gather TidyR 中引用多个独立变量?
我有这个数据集,我希望将其改造成长格式:(更新链接)https://drive.google.com/file/d/1EqD58WVXm-v35Jr6GAwL6arxzO_tTyFa/view?usp=sharing
在重塑的手动方法中,我这样做:
census_data <- read.csv(file.choose())
colnames(census_data)[8] <- "CENSUSPOP2010"
census_long <- census_data %>%
gather(Var,Value,-SUMLEV,-REGION,-DIVISION,-STATE,-COUNTY,-STNAME,-CTYNAME) %>%
mutate(Time = sub("[A-Za-z]+","",Var),Type = sub("[\\_0-9]+",Var)) %>%
select(-Var) %>%
spread(Type,Value)
但是我希望独立的vars被引用,所以很容易将它传递给自定义函数,所以我不得不尝试这样定义它:
var <- c("SUMLEV","REGION","DIVISION","STATE","COUNTY","STNAME","CTYNAME")
var_enquos <- enquos(var)
census_long <- census_data %>%
gather(Var,-!!!var_enquos) %>%
mutate(Time = sub("[A-Za-z]+",Value)
但这会产生:Error: Can't use !!! at top level.
难道这种做法是不行的吗?欢迎任何建议,谢谢
解决方法
这是一种使用 pivot_longer
(gather
的后继者)和“curly curly”运算符的方法,它完成了 enquo 和 !!一步到位。
var <- names(mtcars)[2:11]
var
# [1] "cyl" "disp" "hp" "drat" "wt" "qsec" "vs" "am" "gear" "carb"
library(tidyverse)
mtcars %>%
pivot_longer(cols = {{ var }})
# A tibble: 320 x 3
mpg name value
<dbl> <chr> <dbl>
1 21 cyl 6
2 21 disp 160
3 21 hp 110
4 21 drat 3.9
5 21 wt 2.62
6 21 qsec 16.5
7 21 vs 0
8 21 am 1
9 21 gear 4
10 21 carb 4
# … with 310 more rows
或者如果您想坚持使用 gather
:
mtcars %>%
gather("name","value",{{ var }})
有关“卷曲”或“拥抱”运算符的更多信息,这里有更多资源:
https://www.tidyverse.org/blog/2019/06/rlang-0-4-0/#a-simpler-interpolation-pattern-with-
https://sharla.party/post/tidyeval/
https://www.brodrigues.co/blog/2019-06-20-tidy_eval_saga/
curly curly Tidy evaluation and modifying inputs or their names
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