How to use logical "OR" operation for comparing string??

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Shamim 2017-12-15

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https://ww2.mathworks.cn/matlabcentral/answers/373198-how-to-use-logical-or-operation-for-comparing-string

编辑： Shamim 2017-12-15

采纳的回答： Walter Roberson

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I tried with the code as given:

strcmp('normal'||'neptune',{'normal'; 'DoS'; 'neptune'; 'R2L'})

and the error is saying that the OR "||" operator must be convertible to logical scalar values. So, what could be the possible solution to this?? thanks in advance.

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Walter Roberson 2017-12-15

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https://ww2.mathworks.cn/matlabcentral/answers/373198-how-to-use-logical-or-operation-for-comparing-string#answer_296481

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any( ismember({'normal', 'neptune'}, {'normal'; 'DoS'; 'neptune'; 'R2L'}) )

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Walter Roberson 2017-12-15

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For the index positions,

[tf, idx] = ismember({'normal', 'neptune'}, {'normal'; 'DoS'; 'neptune'; 'R2L'})

The returned idx would be [1 3] in this example.

idx(K) will be valid only in the locations where tf(K) is true (and will be 0 otherwise.)

Shamim 2017-12-15

编辑：Shamim 2017-12-15

Hello Mr. Roberson first of all thank you very much for your help and secondly I guess that, I didn't explain my problem properly. The code above is returning the first true index position only. If the same string is repeated again in the cell array then it's not returning those positions.

In attached picture I showed two commands and my intention was to merge those two commands into one because my real operation is much more bigger than this and it will also help me to reduce 32 if else condition into one single command.

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