Matlab: Index for 5 x 5 grid points - matlab

Question

For the following:
x = [0.5 1.5 2.5 3.5 4.5];
for k = 1:1:5
plot(x(k),x','b^','linewidth', 2)
hold on
end
similar to:
[x,y] = meshgrid(0.5:1:4.5);
How can i index each point (blue triangles) coordinates?
Outcome should be like this:
point1 = [x(1),x(1)]; % [0.5,0.5]
point2 = [x(1),x(2)]; % [0.5,1.5]
point3 = [x(1),x(3)]; % [0.5,2.5]
point4 = [x(1),x(4)]; % [0.5,3.5]
point5 = [x(1),x(5)]; % [0.5,4.5]
point6 = [x(2),x(1)]; % [1.5,0.5]
...
point25 = [x(5),x(5)];% [4.5,4.5]
I must do something wrong or matlab program isnt letting me index these today.
[~,idx] = length(point(:));
idxpoint = ind2sub(size(point),idx);
Please write a working example.
Thank you in advance.

Answer 1

You almost had it. You can use meshgrid for that:
x = linspace(0.5, 4.5, 5);
y = linspace(0.5, 4.5, 5);
[Y, X] = meshgrid(x, y);
points = [X(:) Y(:)];
This method has the advantage that you can use different linspace for x and y coordinates.
Now every row of points stores x and y coordinates one point:
points(1,:)
ans =
0.5000
0.5000
points(25,:)
ans =
4.5000
4.5000

Answer 2

You can stack all of your points into an N-by-2 matrix, with each row representing a point"
close all
x = [0.5 1.5 2.5 3.5 4.5];
n = length(x);
X = [];
for k = 1:1:5
plot(x(k),x','b^','linewidth', 2)
X = [X; repmat(x(k),n,1) x'];
hold on
end
% replot on new figure
figure, hold on
plot(X(:,1),X(:,2),'b^','linewidth',2)
% Each row of X is one of your points, i.e.
% Point number 5:
X(5,:)

Answer 3

What about the following?
[x y] = meshgrid(.5:1:4.5);
points = [reshape(x,1,[])',reshape(y,1,[])']
points =
0.5000 0.5000
0.5000 1.5000
0.5000 2.5000
0.5000 3.5000
0.5000 4.5000
1.5000 0.5000
1.5000 1.5000
1.5000 2.5000
1.5000 3.5000
1.5000 4.5000
2.5000 0.5000
2.5000 1.5000
2.5000 2.5000
2.5000 3.5000
2.5000 4.5000
3.5000 0.5000
3.5000 1.5000
3.5000 2.5000
3.5000 3.5000
3.5000 4.5000
4.5000 0.5000
4.5000 1.5000
4.5000 2.5000
4.5000 3.5000
4.5000 4.5000