Checking whether one row of an array is equal to the rows in a separate array

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Hans123 2019-7-17

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评论： Star Strider 2019-7-17

I trying to compare one row of an Array A with all the rows in another array B of the same size, the logical answer will be used in an if condition

The line I have below is what I am using. Currently the arrays are small enough for me to observe there are rows on both arrays that are equal, but the counter is not updating (the counter is my way of keeping track of equal rows).

for k=1:10
    if isequal(A(k,1:3),B(:,1:3))
       counter=counter+1
        ...
    else
    ....
    end
end

I hope I was articulate enough describe my question, please let me know whether the isequal is the right conditional statement to use

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Answer 1

Star Strider 2019-7-17

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https://ww2.mathworks.cn/matlabcentral/answers/472228-checking-whether-one-row-of-an-array-is-equal-to-the-rows-in-a-separate-array#answer_383688

I would be tempted to use the ismember function with the 'rows' option (or ismembertol with the 'ByRows' option).

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Hans123 2019-7-17

works perfectly, thanks as always Star Strider. :)

Star Strider 2019-7-17

As always, my pleasure!

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