Select function variable column name in dplyr of R language

Background introduction ：

R In language , Data frame column names are standardized , Here I want to extract Y2:Y11, Q1:Q5 Such column names , I don't want to write a complete column name ,

Generate a variable name outside, including the above content , such as ：

n1 = str_c("Y",2:11)
n1
n2 = str_c("Q",1:5)
n2

And then directly according to n1,n2 Content to extract .

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Problem solving

library(dplyr)
dd %>% select(n1,n2) %>% head

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With a prefix bug, If there is n1 and n2 Column name of , The above data becomes ：

dd$n1 = rnorm(44)
dd$n2 = rnorm(44)
library(dplyr)
dd %>% select(n1,n2) %>% head

obviously , This is not what we want .

Better solution

use dplyr Medium all_of function , Use the contents of variables , Instead of the original name of the variable ：

dd %>% select(all_of(n1),all_of(n2)) %>% head

This is a more appropriate plan .

Problem solving ！