How to Find a Value From Another Value?

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?

Answer 1

[Birdman]

One approach:

A=[1 2 3;4 5 6;7 8 9];
[r,c]=find(A==9);
value=A(r,1)

[Rafael]

Your code works, but only the last line I just had to use.

[Birdman]

What did you want ?

[Rafael]

I got it working. I only had to use your last line code. I had it like this, Value=find(A(r,1))

Answer 2

[Andrei Bobrov]

A = reshape(1:16,4,[]); % Let A - your array (example)

out = A(A(:,end) == 14,1)

[Rafael]

Can you explain to me what exactly does these codes do? I mean, 1:16 I understand, but the other things I don't.

[Andrei Bobrov]

A = reshape(1:16,4,[]);

It's example of your array.