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

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.

[Walter Roberson]

I am not clear on what the size is of each element of the cell array?

[Ray]

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.

Answer 1

[Walter Roberson]

x = cellfun(@(C) C(1), YourCell);
y = cellfun(@(C) C(2), YourCell);

Answer 2

[Image Analyst]

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.

[Image Analyst]

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]

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.

Answer 3

[Andrei Bobrov]

cell2mat(cellfun(@(x)reshape(x,1,1,[]),C,'un',0))