Using find() to identify values in an array that are present in another array

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Dr.Vini42
Dr.Vini42 2017-2-21
回答： Dr.Vini42 2017-2-21
I am trying to extract values in rows 2 and 3 from an array when the corresponding value in row 1 is equal to a certain value present in a list (another array). I am attempting to do this with find(), and am wondering if there is a way to incorporate ismember(), but I am no sure how to proceed. I have attached screenshot of my main array below. The values change from left to right over 7136 columns, but the increments are very fine. Thanks!

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Dr.Vini42
Dr.Vini42 2017-2-21
Okay, I got it to work now. The first answer was close, but this one is correct. For some reason using ismember() changed the syntax of find(). I assume it has to do with the output of ismember(), but perhaps someone else could offer a more thorough explanation.
find(ismember(comparison_array),array(1,:));

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Dr.Vini42
Dr.Vini42 2017-2-21
编辑：Dr.Vini42 2017-2-21
Never mind, I discovered a solution.
find(array(ismember(comparison_array),array(1,:)));
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Dr.Vini42
Dr.Vini42 2017-2-21
编辑：Dr.Vini42 2017-2-21
Actually, I changed my mind. My solution is not working quite as I intended. Perhaps there is a better way. My solution appears to be withdrawing the first X values from my array, according to how many values are in my comparison_array. This was not initially obvious because of the small incrementation I had mentioned.

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