R – Select elements from a data frame with a column that has the same name as a global variable with `dplyr`

Question:

Consider the following data.frame and the variable x

df <- data.frame(x = c(rep(0, 10), rep(1, 10)), y = 1:20)
x <- 0

Tried using dplyr to select elements from column x equals global variable x

library(dplyr)
df %>% filter(x == x))

But I got the entire data.frame in the response. The filter must be considering only the column, I imagine.

How do I tell the filter that one of the x 's is a global variable?

Answer:

Use .GlobalEnv$x :

library(dplyr)
df %>% 
  filter(x == .GlobalEnv$x)

   x  y
1  0  1
2  0  2
3  0  3
4  0  4
5  0  5
6  0  6
7  0  7
8  0  8
9  0  9
10 0 10