remove a column in a df with a special name in r

To remove a column from a dataframe with a specific name, you can use the dplyr package in R. Here is an example:

main.r
library(dplyr)

# create a sample dataframe
df <- data.frame(a = 1:3, b = 4:6, c = 7:9)

# check the original dataframe
df
#>   a b c
#> 1 1 4 7
#> 2 2 5 8
#> 3 3 6 9

# remove the column named "b"
df <- df %>% select(-b)

# check the updated dataframe
df
#>   a c
#> 1 1 7
#> 2 2 8
#> 3 3 9
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In this example, we use the select() function from dplyr to remove the "b" column from the df dataframe. The - sign indicates that the column should be removed. Finally, we assign the updated dataframe back to df.