Add a column of row numbers to a data frame

add_rowindex(x)

Arguments

x

A data frame

Value

The same data frame with a column of 1-based integers named .row.

Examples

mtcars %>% add_rowindex()
#> mpg cyl disp hp drat wt qsec vs am gear carb .row #> 1 21.0 6 160.0 110 3.90 2.620 16.46 0 1 4 4 1 #> 2 21.0 6 160.0 110 3.90 2.875 17.02 0 1 4 4 2 #> 3 22.8 4 108.0 93 3.85 2.320 18.61 1 1 4 1 3 #> 4 21.4 6 258.0 110 3.08 3.215 19.44 1 0 3 1 4 #> 5 18.7 8 360.0 175 3.15 3.440 17.02 0 0 3 2 5 #> 6 18.1 6 225.0 105 2.76 3.460 20.22 1 0 3 1 6 #> 7 14.3 8 360.0 245 3.21 3.570 15.84 0 0 3 4 7 #> 8 24.4 4 146.7 62 3.69 3.190 20.00 1 0 4 2 8 #> 9 22.8 4 140.8 95 3.92 3.150 22.90 1 0 4 2 9 #> 10 19.2 6 167.6 123 3.92 3.440 18.30 1 0 4 4 10 #> 11 17.8 6 167.6 123 3.92 3.440 18.90 1 0 4 4 11 #> 12 16.4 8 275.8 180 3.07 4.070 17.40 0 0 3 3 12 #> 13 17.3 8 275.8 180 3.07 3.730 17.60 0 0 3 3 13 #> 14 15.2 8 275.8 180 3.07 3.780 18.00 0 0 3 3 14 #> 15 10.4 8 472.0 205 2.93 5.250 17.98 0 0 3 4 15 #> 16 10.4 8 460.0 215 3.00 5.424 17.82 0 0 3 4 16 #> 17 14.7 8 440.0 230 3.23 5.345 17.42 0 0 3 4 17 #> 18 32.4 4 78.7 66 4.08 2.200 19.47 1 1 4 1 18 #> 19 30.4 4 75.7 52 4.93 1.615 18.52 1 1 4 2 19 #> 20 33.9 4 71.1 65 4.22 1.835 19.90 1 1 4 1 20 #> 21 21.5 4 120.1 97 3.70 2.465 20.01 1 0 3 1 21 #> 22 15.5 8 318.0 150 2.76 3.520 16.87 0 0 3 2 22 #> 23 15.2 8 304.0 150 3.15 3.435 17.30 0 0 3 2 23 #> 24 13.3 8 350.0 245 3.73 3.840 15.41 0 0 3 4 24 #> 25 19.2 8 400.0 175 3.08 3.845 17.05 0 0 3 2 25 #> 26 27.3 4 79.0 66 4.08 1.935 18.90 1 1 4 1 26 #> 27 26.0 4 120.3 91 4.43 2.140 16.70 0 1 5 2 27 #> 28 30.4 4 95.1 113 3.77 1.513 16.90 1 1 5 2 28 #> 29 15.8 8 351.0 264 4.22 3.170 14.50 0 1 5 4 29 #> 30 19.7 6 145.0 175 3.62 2.770 15.50 0 1 5 6 30 #> 31 15.0 8 301.0 335 3.54 3.570 14.60 0 1 5 8 31 #> 32 21.4 4 121.0 109 4.11 2.780 18.60 1 1 4 2 32