Hey Michal,
It's my understanding that you want to interact with your plot, get certain values of coordinates (x, y) from the figure by clicking on a particular point and then do further computations based on the values obtained.
You can go through Enable data cursor mode - MATLAB (mathworks.com) documentation to do the same. Here's a code snippet you can refer to:
x = linspace(0, 7, 100);
y = linspace(0, 3, 100);
curve1 = x/6;
curve2 = ones(100, 1)*0.5;
curve3 = ones(100, 1);
f = figure;
plot(x, curve1, 'r', 'LineWidth', 2);
hold on;
plot(x, curve3, 'b', 'LineWidth', 2);
plot(curve2, y, 'k', 'LineWidth', 2);
dcm = datacursormode(f);
dcm.Enable = 'on';
dcm.UpdateFcn = @updateCoordinates;
function txt = updateCoordinates(~,info)
x = info.Position(1);
y = info.Position(2);
disp([x y]); % you can use the coordinates here to index into your table
% and find the corresponding row index
txt = ['(' num2str(x) ', ' num2str(y) ')'];
end
Now that you have the 'x' and 'y' coordinates, you can refer the following code snippet to find the corresponding row in your table having these values.
table = [1 2 3; 4 5 6; 7 8 9];
[row1 col1] = find(table == 7);
[row2 col2] = find(table == 9);
intersect(row1, row2)
Hope this helps!
