Shifting values in a matrix, Alignment of two matrices
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I want to align the values of two matrices so that the corresponding values in one column will align the other columns. For example
A=
1 2.5
2 5.4
3 4.3
4 3.3
5 5.4
6 2.5
B=
6 3.3
7 5.4
5 2.5
3 2.5
5 5.4
9 4.3
I want to manipulate matrix B so that it's second column aligns with A so I can get a third matrix
C =
1 2.5 3 2.5
2 5.4 5 5.4
3 4.3 9 4.3
4 3.3 6 3.3
5 5.4 7 5.4
6 2.5 5 2.5
Then separate the 1st and 3rd columns
D=
1 3
2 5
3 9
4 6
5 7
6 5
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回答(3 个)
Andrei Bobrov
2015-12-22
[~,ib] = sortrows(B,[2 1]);
[~,ia] = sortrows(A,[2 1]);
[~,ia2] = sort(ia);
D = [A(:,1),B(ib(ia2),1)];
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Image Analyst
2015-12-22
Shifting (translating) and sorting are two different things. Which do you want?
For shifting you'd use "register" the array with imregister() or do normalized cross correlation with normxcorr2() (I have a demo if you want it).
For sorting you'd simply use sort() - it's so simple that we hardly need to show you.
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Image Analyst
2015-12-22
Normxcorr2() is used to find a template in another image. The demo is attached.
If you want to shift the image a little bit, it sounds like imregister() is exactly what you want. There are demos for it in the help. I think there are some other functions that are better for very large shifts. Search this forum for imregister or registration or Alex Taylor (the Mathworks developer who wrote them).
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