how can I locate a number in a vector with out using the function find?

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Stephanie Velasco 2017-2-8

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评论： Stephen23 2017-2-11

采纳的回答： Stephen23

I am trying to locate a number in vector with out using the function 'find'.is there a way i could do this?

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Guillaume 2017-2-9

编辑：Guillaume 2017-2-9

And why woulnd't you want to use find? Unless it is for some homework, in which case you should make the effort of solving the problem yourself rather than cheating and asking for somebody else to do it for you.

Stephanie Velasco 2017-2-11

编辑：Stephanie Velasco 2017-2-11

@Guillaume : I would like to add that this was actually just a practice problem given by the professor. Also, I did attempt the problem and made a for loop but it seemed too long. I was just wondering if there was an easier way. So that being said, I suggest you get all you information first before assuming things that are incorrect. Like I said, this problem came from a pile of practice question given by the professor, so they would not be graded. So, no, I was not cheating. If you don't have anything productive and positive to say how about you just ignore the question and move on with your life.

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Answer 1

Stephen23 2017-2-9

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https://ww2.mathworks.cn/matlabcentral/answers/324074-how-can-i-locate-a-number-in-a-vector-with-out-using-the-function-find#answer_254020

在 MATLAB Online 中打开

Here is one easy way using indexing:

>> x = 5 % value to find
>> V = randi(9,1,10) % vector of values
V =
   3   5   6   7   6   3   5   2   6   6
>> idx = 1:numel(V);
>> idx(V==x)
ans =
   2   7

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Stephanie Velasco 2017-2-11

Thank you so much, you are kind!

Stephen23 2017-2-11

@Stephanie Velasco: if my answer helped you, please consider accepting it. This is an easy way for you to show your appreciation (we are all volunteers).

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Answer 2

Image Analyst 2017-2-9

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https://ww2.mathworks.cn/matlabcentral/answers/324074-how-can-i-locate-a-number-in-a-vector-with-out-using-the-function-find#answer_253982

编辑：Image Analyst 2017-2-9

You can use ismember(), ismembertol(), intersect(), or strfind(), or even an "if" inside a for loop.

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Jan 2017-2-9

@IA: The source code of ismember, ismembertol and inetrsect could contain a call to the find() function. The question sounds as a homework problem, so I'd prefer the for loop and an if, although this is a really bad solution from the viewpoint of software engineering.

Stephanie Velasco 2017-2-11