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separate x, y coordinate in a matrix into two different matrices

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Ray
Ray 2015-10-5
回答： Andrei Bobrov 2015-10-6
I have 18 by 18 matrix with each cell has [-1;1] [-1;1] etc.. I want to separate this matrix into two 18 by 18 matrices. The first matrix would only have the first row for example, -1,-1 and the second matrix would have the second column for example 1, 1.
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Ray
Ray 2015-10-6
each cell in the 18 by 18 matrix is 2 by 1 cell i.e. [-1;1] which represents the [x;y]. I need to separate the all x's in one matrix and all the y in another matrix.

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回答（3 个）

Walter Roberson
Walter Roberson 2015-10-6
x = cellfun(@(C) C(1), YourCell);
y = cellfun(@(C) C(2), YourCell);
Image Analyst
Image Analyst 2015-10-5
Assuming it's a normal numerical matrix and not a cell array, try this:
firstRow = yourMatrix(1,:); % Extract first row.
secondRow = yourMatrix(2,:); % Extract second row.
  2 个评论
Image Analyst
Image Analyst 2015-10-5
Oh, sorry, you said you want the first row and the second column, not second row. To get the second column, you'd do this:
secondCol = yourMatrix(:, 2); % Extract second column.
Ray
Ray 2015-10-6
each cell of the 18 by 18 matrix looks like this [x;y] or [-1;1]. what i want to do is have all the x in one matrix and y in another matrix.

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Andrei Bobrov
Andrei Bobrov 2015-10-6
cell2mat(cellfun(@(x)reshape(x,1,1,[]),C,'un',0))

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