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Assign Numeric Values to List of Strings

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Calum
Calum 2015-4-7
评论： per isakson 2015-4-7
Hi,
If I have a cell array vertically sorted alphabetically as follows:
X=['a';'a';'c';'h';'x';'x']
What code should I use to obtain the numeric output:
Y=[1;1;2;3;4;4]
Where each integer in Y represents the alphabetic rank of the corresponding string in X.
Many thanks,
Cal

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回答（2 个）

Matt J
Matt J 2015-4-7
[~,~,Y]=unique(X);
Thorsten
Thorsten 2015-4-7
That's easy
Y = [ 1 1 + cumsum(diff(X - 'a' + 1) > 0)'];
(and one of the reasons why I love Matlab :-))

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