Return a data.frame containing only the columns where the rows are not identical.
row_compare(.df)
row_compare(mtcars[1:3,])
#> mpg cyl disp hp drat wt qsec vs carb
#> Mazda RX4 21.0 6 160 110 3.90 2.620 16.46 0 4
#> Mazda RX4 Wag 21.0 6 160 110 3.90 2.875 17.02 0 4
#> Datsun 710 22.8 4 108 93 3.85 2.320 18.61 1 1