Effacer les filtres
Effacer les filtres

computing vectors with string and numbers (easy question)

2 vues (au cours des 30 derniers jours)
Andrea Miceli
Andrea Miceli le 25 Mar 2021
Hi evreyone,
I have a vector of names(str vector) and i would like to associate a number to each name
For example evreytime that the name 'Andrea' came up in the first vectror in the second one it gives me back the number 3.
Thank you for your time!
  2 commentaires
Stephen23
Stephen23 le 25 Mar 2021
"I have a vector of 12 names(str vector) and i would like to associate a number to each name (so from 1:12)."
That just sounds like the indices.
Andrea Miceli
Andrea Miceli le 25 Mar 2021
I modifed the question, now it should be clearer.

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Réponse acceptée

Paul Hoffrichter
Paul Hoffrichter le 26 Mar 2021
Modifié(e) : Paul Hoffrichter le 26 Mar 2021
Here is code that keeps the indexing scheme based upon the order in which the names occur in your vector of strings.
>> S = ["Howard" "Howard" "joe" "april" "andrea" "joe" "andrea" "Howard"]
S =
1×8 string array
"Howard" "Howard" "joe" "april" "andrea" "joe" "andrea" "Howard"
>> SUniq = unique(S, 'stable')
SUniq =
1×4 string array
"Howard" "joe" "april" "andrea"
>> [~, Locb] = ismember(S, SUniq)
Locb =
1 1 2 3 4 2 4 1

Plus de réponses (1)

Paul Hoffrichter
Paul Hoffrichter le 25 Mar 2021
Modifié(e) : Paul Hoffrichter le 25 Mar 2021
>> S = ["joe" "april" "andrea" "joe" "andrea"]
S =
1×5 string array
"joe" "april" "andrea" "joe" "andrea"
>> SU = unique(S)
SU =
1×3 string array
"andrea" "april" "joe"
>> [~,Locb] = ismember(S, SU)
Locb =
3 2 1 3 1
Every time "joe" came up in S, it shows up as a 3 in Locb.
Every time "andrea" came up in S, it shows up as a 1 in Locb.
Every time "april" came up in S (only 1 time), it shows up as a 2 in Locb.

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