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how to label strings in an array with an ID

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Ryan Rose
Ryan Rose on 3 Aug 2020
Commented: Ryan Rose on 3 Aug 2020
I have a array
StringID=['a',1;
'b',2;
'c',3]
and a table with a column with a bunch of strings that exactly match the strings in StringID.
tc=['c';
'b';
'c';
'a';
'c']
How can I make a column vector that identifies the strings with the number in StringID?
ans=[3;
2;
3;
1;
3]
I would like this to be scaleable to a few thousand rows and a StringID column of a couple hundred strings. I feel like there is a simple solution I'm not thinking of. I assume there is some combo of find and strcmp that I'm not thinking of. I could probably just do it with a loop, but I am trying to avoid that.

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Accepted Answer

Adam Danz
Adam Danz on 3 Aug 2020
Edited: Adam Danz on 3 Aug 2020
StringID needs to be a cell array. Then,
[~, idx] = ismember(tc,StringID(:,1));
Also see lower() if you want to control for cases.

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Ryan Rose
Ryan Rose on 3 Aug 2020
This is exactly what I was looking for. Thank you.

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More Answers (1)

madhan ravi
madhan ravi on 3 Aug 2020
T = cell2table(StringID(:, 2));
T.Properties.RowNames = StringID(:, 1);
Wanted = T{num2cell(tc), :}

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