Descending order

Transform a vector into a format that will be sorted in descending order. This is useful within arrange().

desc(x)

Arguments

x	vector to transform

Examples

desc(1:10)
#>  [1]  -1  -2  -3  -4  -5  -6  -7  -8  -9 -10
desc(factor(letters))
#>  [1]  -1  -2  -3  -4  -5  -6  -7  -8  -9 -10 -11 -12 -13 -14 -15 -16 -17 -18 -19
#> [20] -20 -21 -22 -23 -24 -25 -26

first_day <- seq(as.Date("1910/1/1"), as.Date("1920/1/1"), "years")
desc(first_day)
#>  [1] 21915 21550 21185 20819 20454 20089 19724 19358 18993 18628 18263

starwars %>% arrange(desc(mass))
#> # A tibble: 87 x 14
#>    name    height  mass hair_color  skin_color eye_color birth_year sex   gender
#>    <chr>    <int> <dbl> <chr>       <chr>      <chr>          <dbl> <chr> <chr> 
#>  1 Jabba …    175  1358 NA          green-tan… orange         600   herm… mascu…
#>  2 Grievo…    216   159 none        brown, wh… green, y…       NA   male  mascu…
#>  3 IG-88      200   140 none        metal      red             15   none  mascu…
#>  4 Darth …    202   136 none        white      yellow          41.9 male  mascu…
#>  5 Tarfful    234   136 brown       brown      blue            NA   male  mascu…
#>  6 Owen L…    178   120 brown, grey light      blue            52   male  mascu…
#>  7 Bossk      190   113 none        green      red             53   male  mascu…
#>  8 Chewba…    228   112 brown       unknown    blue           200   male  mascu…
#>  9 Jek To…    180   110 brown       fair       blue            NA   male  mascu…
#> 10 Dexter…    198   102 none        brown      yellow          NA   male  mascu…
#> # … with 77 more rows, and 5 more variables: homeworld <chr>, species <chr>,
#> #   films <list>, vehicles <list>, starships <list>