How to organize an array (x_i,y_j,z) such that (x_i,y_i)=z?

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Md. Hasan Rahman
Md. Hasan Rahman 2021-8-1
评论： Md. Hasan Rahman 2021-8-1
I have a matrix such that:
A=[1 1 2; 1 2 0.5; 2 1 0.5; 2 2 1];
I would like to organize the last coloumn of array A such that,
B=[2 0.5; 0.5 1];
As we can see B(1,1)=2; B(1,2)=0.5; B(2,1)=0.5; B(2,2)=1.
The coordinate B(x,y) come from the from x corresponds to A(:,1) and y corresponds to A(:,2). Can anyone suggest me how should I approach? Thank you.

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Stephen23
Stephen23 2021-8-1
编辑：Stephen23 2021-8-1
Ran in:
The trick is to use https://www.mathworks.com/help/matlab/ref/sub2ind.html
A = [1,1,2;1,2,0.5;2,1,0.5;2,2,1]
A = 4×3
1.0000 1.0000 2.0000 1.0000 2.0000 0.5000 2.0000 1.0000 0.5000 2.0000 2.0000 1.0000
S = max(A(:,1:2),[],1);
B = nan(S);
B(sub2ind(S,A(:,1),A(:,2))) = A(:,3)
B = 2×2
2.0000 0.5000 0.5000 1.0000

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