I have a data table with 5778 rows and 28 columns. How do I delete ALL of the 1st row. E.g. let's say the data table had 3 rows and 4 columns and looked like this:

```
Row number tracking_id    3D71    3D72  3D73
    1          xxx         1       1     1
    2          yyy         2       2     2
    3          zzz         3       3     3

```

I want to create a data table that looks like this:

```
    Row number tracking_id    3D71    3D72  3D73
    1          yyy             2       2     2
    2          zzz             3       3     3

```

i.e. I want to delete all of row number 1 and then shift the other rows up. 

I have tried `datatablename[-c(1)]` but this deletes the first column not the first row!

Many thanks for any help!