How to label a class in an array in matlab

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syd
syd 2014-3-15
回答： Image Analyst 2014-3-15
So I have this 600 x 6 matrix. This is formed by vertically concatenating 10 10x6 matrix.
I want to know if there is a way to label a class to identify each 10x6 matrix within this 600x6 matrix
For eg
BigMatrix is the 600x6 matrix A is a 10x6 matrix, B is another 10x6 matrix
How would I be able to identify A and B within this BigMatrix
Thanks
  2 个评论
per isakson
per isakson 2014-3-15
No, that is not possible with a numerical array, e.g. "600 x 6 matrix".
Image Analyst
Image Analyst 2014-3-15
编辑：Image Analyst 2014-3-15
I think he made a mistake and meant a 100 row by 6 column matrix, not 600 by 6 because 10 times 10 is 100, not 600.

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回答（2 个）

Mischa Kim
Mischa Kim 2014-3-15
Syd, you could use a structure array:
BigMatrix.A = zeros(10,6);
BigMatrix.B = zeros(10,6);
...
  2 个评论
syd
syd 2014-3-15
编辑：Walter Roberson 2014-3-15
but what if i have certain values to be assigned
eg can i do
BigMatrix.A=BigMatrix(10,6)
BigMatrix.B=BigMatrix(20,6)
where (10,6) was the values from matrix A, (20,6) was the values from matrix B
Mischa Kim
Mischa Kim 2014-3-15
You can assign any matrix, or any part of a matrix. E.g.,
HugeMatrix = [1 2 3; 4 5 6; ...
7 8 9; 10 11 12];
BigMatrix.A = HugeMatrix(1:2,:); % first two rows, all cols
BigMatrix.B = HugeMatrix(3:4,:); % rows 3 and 4, all cols
HugeMatrix would be your 600-by-6.

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Image Analyst
Image Analyst 2014-3-15
Just do this:
labeledMatrix = [ones(10,6);
2*ones(10,6);
3*ones(10,6);
4*ones(10,6);
5*ones(10,6);
6*ones(10,6)]
Every element in that matrix is a number (1 through 6) that says what original array was used to make the array, at that location, by vertical stitching.

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