Identifying same values of two arrays

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Mia Dier 2021-6-26

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回答： Cris LaPierre 2021-6-26

I have two string arrays: array1 and array2. I want to create a variable named change that is equal to 0 if array1 and array2 are equal or one of them is NaN and 1 otherwise.

array1 array2 change

A A 0

A C 1

C C 0

NaN B 0

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Scott MacKenzie 2021-6-26

Further to @Soniya Jain's comment, what are A, B, and C in array1 and array2? Are they variables? Or, are they character or string literals? If they are variables, what type of data do they hold?

Mia Dier 2021-6-26

Dear Soniya,

I edited my question and fixed that part. I couldn't come up any solution other than assigning unique numbers to each value, taking difference of the arrays and creating variable change that is equal to 1 if the difference is not 0. But I'm trying to find an easier way.

Dear Scott,

array1 and array2 are string arrays. So, I believe that they store string literals.

Thank you for your comments. I hope the question makes more sense now.

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Answer 1

Cris LaPierre 2021-6-26

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在 MATLAB Online 中打开

Note that nan means not a number. When the rest of your data is chars or strings, nan actually gets convereted to <missing>.

array1 = ["A" "A" "A" "C" "C" nan]';
array2 = ["A" "A" "C" "C" "C" "B"]';
array1(ismissing(array1)) = array2(ismissing(array1));
array2(ismissing(array2)) = array1(ismissing(array2));
change = array1~=array2
change = 6×1 logical array
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