computing vectors with string and numbers (easy question)

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Andrea Miceli
Andrea Miceli 2021-3-25
编辑： Paul Hoffrichter 2021-3-26
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 个评论
Stephen23
Stephen23 2021-3-25
"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.

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采纳的回答

Paul Hoffrichter
Paul Hoffrichter 2021-3-26
编辑：Paul Hoffrichter 2021-3-26
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

更多回答（1 个）

Paul Hoffrichter
Paul Hoffrichter 2021-3-25
编辑：Paul Hoffrichter 2021-3-25
>> 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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