I've converted a Document Term Matrix to a dataframe using this simple line
dtm.df <- as.data.frame(inspect(dtm))
The problem is I want to remove the first column (filenames) but the column has no name.
There might be two different issues here: rownames vs. columns.
head(mtcars)
mpg cyl disp hp drat wt qsec vs am gear carb
Mazda RX4 21.0 6 160 110 3.90 2.620 16.46 0 1 4 4
Mazda RX4 Wag 21.0 6 160 110 3.90 2.875 17.02 0 1 4 4
Datsun 710 22.8 4 108 93 3.85 2.320 18.61 1 1 4 1
Hornet 4 Drive 21.4 6 258 110 3.08 3.215 19.44 1 0 3 1
Hornet Sportabout 18.7 8 360 175 3.15 3.440 17.02 0 0 3 2
Valiant 18.1 6 225 105 2.76 3.460 20.22 1 0 3 1
Here you see a column printed without a name. These are the rownames.
mpg is the first column. If we wanted to remove this column without refering to its name, we could use
mtcars <- mtcars[,-1]
head(mtcars)
cyl disp hp drat wt qsec vs am gear carb
Mazda RX4 6 160 110 3.90 2.620 16.46 0 1 4 4
Mazda RX4 Wag 6 160 110 3.90 2.875 17.02 0 1 4 4
Datsun 710 4 108 93 3.85 2.320 18.61 1 1 4 1
Hornet 4 Drive 6 258 110 3.08 3.215 19.44 1 0 3 1
Hornet Sportabout 8 360 175 3.15 3.440 17.02 0 0 3 2
Valiant 6 225 105 2.76 3.460 20.22 1 0 3 1
On the other hand, if you are talking about the rownames, which are still printed, you can remove them with the function rownames:
rownames(mtcars) <- NULL
head(mtcars)
cyl disp hp drat wt qsec vs am gear carb
1 6 160 110 3.90 2.620 16.46 0 1 4 4
2 6 160 110 3.90 2.875 17.02 0 1 4 4
3 4 108 93 3.85 2.320 18.61 1 1 4 1
4 6 258 110 3.08 3.215 19.44 1 0 3 1
5 8 360 175 3.15 3.440 17.02 0 0 3 2
6 6 225 105 2.76 3.460 20.22 1 0 3 1