como excluir colunas em df em 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
Cheerful Corncrake
> 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# 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)]# delete multiple columns in r
# delete column in R by mapping Null value to them
dataset$firstcol <- dataset$nextcol <- dataset$anothercol <- NULL