Finding indexes of duplicate words in an array

Hello, how would I go about finding the indexes of repeated words in an array.

k = ['dog' 'cat' 'dog' 'lion' 'tiger'];

How would I find the indexes where dog is located?

Thanks!

Answer 1

[Walter Roberson]

k = {'dog' 'cat' 'dog' 'lion' 'tiger'};
[uniquewords, ~, idx] = unique(k);

Now all the places where idx == 1 are places where uniquewords{1} occurred (it will be 'cat'), all the places where idx == 2 are places where uniquewords{2} occurred (it will be 'dog') and so on.

If you know the word you are looking for, then you can use

find(strcmp('dog',k))

[Brandon1363]

I now need to know the indexes of k where 'dog' occurred. This is with a very large array, so how would I go about doing that? Thanks!

[Walter Roberson]

find(strcmp('dog',k))

[Brandon1363]

I've figured it out now. Thanks Walter!