how do i rearrage words in an alphabetical order in an array?

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Given a list of names in an array, how do i rearrange the names in alphabetical order without any conditional functions?
names = ' john alex peter matthew'

Answers (1)

dpb
dpb on 15 Feb 2021
names =sort( split(' john alex peter matthew' ))
names =
5×1 cell array
{0×0 char }
{'alex' }
{'john' }
{'matthew'}
{'peter' }
>>
Eliminate the zero-length element, of course.
Starting with a cellstr() or string() array would make more sense than to have them all in one char() vector.
  4 Comments
Adam Danz
Adam Danz on 16 Feb 2021
dpb's answer works for any number of names separated by spaces. If your data are arranged differently, we're missing that information. Note that names with spaces will be parsed; example: De Franco.
sort(split('De Franco Cicero Edgars' ))
ans = 4x1 cell array
{'Cicero'} {'De' } {'Edgars'} {'Franco'}
One small thing to consider with sort() is that it's case sensitive. The two examples below are sorted incorrectly
sort(["adam", "Alan"])
ans = 1×2 string array
"Alan" "adam"
sort(["DeLuca", "Deangelo"])
ans = 1×2 string array
"DeLuca" "Deangelo"
To get around that sort with all lowercase (or uppercase) and use the index to control the final sorted order
names = ["DeLuca", "Deangelo"];
[~, idx] = sort(lower(names));
names(idx)
ans = 1×2 string array
"Deangelo" "DeLuca"

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