R - drop columns by index r

#drop columns by index
df <- mydata[ -c(1,3:4) ]
#drop columns by name
df = subset(mydata, select = -c(x,z))

DT[, coltodelete := NULL]

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

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

PREVIOUS	NEXT

Code Example
R :: select columns without na in r
R :: remove elements from character vector in r
R :: r remove rows where value is 0
R :: how to set the first column as row names in r
R :: how to append in R list
R :: glyph in r
R :: how to transform days in years R
R :: rnorm r
R :: create file in r
R :: r print concatenate
R :: ggplot - blank title of axis
R :: r concatenate data frame
R :: round multiple columns in r
R :: calculate correlation in r
R :: r environment variables
R :: change all columns type in R
R :: find row with na r
R :: How to extract the row with min or max values? in R
R :: truncate string in r
R :: knn accuracy in r
R :: how to rename variables in r dplyr
R :: r change column value conditionally
R :: switch variable position in r dplyr
R :: geom_jitter transparency
R :: take node names from nodes to edges tidygraph
R :: conditional mean statement r
Rust :: read file buffer rust
Rust :: rust reverse an array
Rust :: rust const string
Rust :: rust cargo error no override and no default toolchain set