how to remove columns in a table in r code example

Example 1: 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 2: how to remove columns in a table in r

# delete multiple columns in r 
# delete column in R by mapping Null value to them
dataset$firstcol <- dataset$nextcol <- dataset$anothercol <- NULL

Example 3: how to delete columns in df in r

> df <- data.frame(x=1:5, y=6:10, z=11:15, a=16:20)
> df <- subset (df, select = -c(x:z))
> df
a
1 16
2 17
3 18
4 19
5 20