How to Find a Value From Another Value?

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Rafael
Rafael 2017-12-7
评论： Rafael 2017-12-7
I have a matrix, so I would like to find a value from the first column by using values from the last columns. For example, I have an specific value from the last column which I found by suing "find". How can I then find the value from the first column from that specific row by using the last column value?

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Birdman
Birdman 2017-12-7
One approach:
A=[1 2 3;4 5 6;7 8 9];
[r,c]=find(A==9);
value=A(r,1)
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Rafael
Rafael 2017-12-7
I got it working. I only had to use your last line code. I had it like this, Value=find(A(r,1))

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Andrei Bobrov
Andrei Bobrov 2017-12-7
编辑：Andrei Bobrov 2017-12-7
A = reshape(1:16,4,[]); % Let A - your array (example)
out = A(A(:,end) == 14,1)
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Rafael
Rafael 2017-12-7
Can you explain to me what exactly does these codes do? I mean, 1:16 I understand, but the other things I don't.

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