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poorly_ordered is a vector of file names of images of
patient samples from different days.
poorly_ordered
#> [1] "patient101-day9.png" "patient98-day10.png" "patient98-day9.png"
#> [4] "patient99-day9.png" "patient98-day11.png" "patient102-day11.png"
#> [7] "patient102-day10.png" "patient100-day11.png" "patient100-day9.png"
#> [10] "patient101-day11.png" "patient102-day9.png" "patient99-day10.png"
#> [13] "patient103-day10.png" "patient103-day9.png" "patient101-day10.png"
#> [16] "patient100-day10.png" "patient103-day11.png" "patient99-day11.png"How do we get this vector into order? Well, alphabetical order doesn’t work:
sort(poorly_ordered)
#> [1] "patient100-day10.png" "patient100-day11.png" "patient100-day9.png"
#> [4] "patient101-day10.png" "patient101-day11.png" "patient101-day9.png"
#> [7] "patient102-day10.png" "patient102-day11.png" "patient102-day9.png"
#> [10] "patient103-day10.png" "patient103-day11.png" "patient103-day9.png"
#> [13] "patient98-day10.png" "patient98-day11.png" "patient98-day9.png"
#> [16] "patient99-day10.png" "patient99-day11.png" "patient99-day9.png"Patient 100 comes before patient 99. This is because 1 comes before 9 in alphabetical order.
It’s possible to alphord the numbers by prefixing them with zeroes:
strex::str_alphord_nums(poorly_ordered)
#> [1] "patient101-day09.png" "patient098-day10.png" "patient098-day09.png"
#> [4] "patient099-day09.png" "patient098-day11.png" "patient102-day11.png"
#> [7] "patient102-day10.png" "patient100-day11.png" "patient100-day09.png"
#> [10] "patient101-day11.png" "patient102-day09.png" "patient099-day10.png"
#> [13] "patient103-day10.png" "patient103-day09.png" "patient101-day10.png"
#> [16] "patient100-day10.png" "patient103-day11.png" "patient099-day11.png"Having done this, the alphabetical order is the one we want:
sort(strex::str_alphord_nums(poorly_ordered))
#> [1] "patient098-day09.png" "patient098-day10.png" "patient098-day11.png"
#> [4] "patient099-day09.png" "patient099-day10.png" "patient099-day11.png"
#> [7] "patient100-day09.png" "patient100-day10.png" "patient100-day11.png"
#> [10] "patient101-day09.png" "patient101-day10.png" "patient101-day11.png"
#> [13] "patient102-day09.png" "patient102-day10.png" "patient102-day11.png"
#> [16] "patient103-day09.png" "patient103-day10.png" "patient103-day11.png"These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
Health stats visible at Monitor.