Finding unique set from large dataset

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Sanjana Sankar
Sanjana Sankar 2019-7-18
评论： Sanjana Sankar 2019-7-19
Hello!
How would one go about to find a unique set of variables that can depict shortly which variables are used in a large dataset using a matlab code?
For example if the english dictionary is my large dataset, I want the output to be the 26 alphabets-saying these are the unique variables used in your large dataset.
Another example
If x = {"abc", "bcd", "ded"}
I want the output as {"a","b","c","d","e"}
Thanks in advance!

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采纳的回答

madhan ravi
madhan ravi 2019-7-18
a = cellfun(@(z)regexp(z,'.','match'),x,'un',0);
Output = num2cell(unique([a{:}]))
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Sanjana Sankar
Sanjana Sankar 2019-7-19
Thank you all. I was looking for the output from Guillaume's method. Thanks a lot!!

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更多回答（2 个）

Waqar Ali Memon
Waqar Ali Memon 2019-7-18
Bruno Luong
Bruno Luong 2019-7-18
编辑：Bruno Luong 2019-7-18
x = ["abc", "bcd", "ded"] % no need using curly bracket for strings
string(unique(cat(2,x{:}))')'

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