How do I store x-y coordinate values in a 2 Dimension array (n x n) with its x-y position ?

I have seven x-y coordinates and I would like to store in 2 Dimensional array.

These values are to be plot exactly like in this picture. In an array, the x-y coordinate values can be assign with a number let say 1. 1 is refer back to coordinate 1 (27,10). Another example, 7 holds information for x-y coordinate (50,123).

How i do assign the x-y coordinates in x-y location and store in 2D array like in the picture ?

Thanks

[the cyclist]

What exactly is the input you have? Can you upload the input data? Use the paper clip icon in the INSERT section of the toolbar.

[Torsten]

I don't understand what you want to store and how.

What I can say is that a usual numerical 2d-matrix can only store a single scalar in each (row,column)-position.

If you want to store two coordinates in one specified position, you either have to use two numerical arrays (X and Y) or you have to use a cell array.

Answer 1

[Chunru]

xy = [27 104;
      35 100;
      47 102;
      25 110;
      35 114; 
      47 109;
      50 123];

A = zeros(7, 7);   % 5x5 is enough for your case
% You may need to adjuxt the following
xc = 25+(0:6)*5+2.5;        % centre of grid
yc = 100+(0:6)*5+2.5;

for i=1:size(xy, 1)
    [~, ix] = min(abs(xy(i, 1) - xc)); 
    [~, iy] = min(abs(xy(i, 2) - yc)); 
    A(iy, ix) = i;
end
A

A = 7×7

1 2 0 0 3 0 0 4 0 0 0 6 0 0 0 5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 7 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

[hahsaka dahsra]

Thank you very much for understanding the objective of the code. That's brilliant. I would to understand why you add 2.5 for the centre of the grid. Thank again.

xc = 25+(0:6)*5+2.5;        % centre of grid
yc = 100+(0:6)*5+2.5;

[Chunru]

The grid 25+(0:6)*5 is 25, 30, 35, ...

The center of grid is 27.5, 32.5, ...

So you need to add 2.5 yo obtain the centre of grid.