drop columns by names in r code example

Example 1: r data frame remove column

df$columnName <- NULL

Example 2: remove column from matrix r

# Remove third column - by column number
MyMatrix <- MyMatrix[,-3]

# Remove third and fifth columns - by feeding the matrix a boolean vector
MyMatrix <- MyMatrix[,c(TRUE,TRUE,FALSE,TRUE,FALSE,TRUE)]

Example 3: R drop columns

undesired <- c('mpg', 'cyl', 'hp')

mtcars <- mtcars %>%
  select(-one_of(undesired))