如何在RStudio Viewer中选择列？

Question

I have a dataframe and would like to inspect and compare several columns. How can I select two or more columns with the data Viewer? I do not want to create a subsample for those columns each time. Is there another way?

data(mtcars)
View(mtcars$mpg)
View(mtcars$mpg, mtcars$mpg) # not working
View(c(mtcars$mpg, mtcars$cyl)) # shows 2 columns underneath each other

Answer 1

I usually use this code to do this

library(dplyr)

mtcars%>%
  select(mpg,cyl)%>%
  View

It uses the dplyr package and the pipe %>% . It works in a way that you first give it your data, then you manipulate it (in your case just selecting the rows) and then throw in View, head() , str() or any other function.

Answer 2

View() will only take a dataframe, not 2 seperate vectors

With base R you could do something like

View(mtcars[c("mpg", "cyl")])

Answer 3

您可以在View使用data.frame而不是c ，即

View(data.frame(mtcars$mpg, mtcars$cyl))