How to draw a rectangle and placed node by clicking on them using MATLAB

draw a rectangle and placed node by clicking on them using matlab

Answer 1

[Kartik Pontula]

From what I understand, you would like to draw a rectangle and place nodes by clicking on them. This code accomplishes that task:

% Create a figure window
figure;

% Initialize an empty array to store the nodes
nodes = [];

% Display instructions
disp('Click on the figure to place nodes. Press the Enter key after you are finished.');

% Loop until the user presses Enter
while true
    % Wait for a mouse click
    [x, y, button] = ginput(1);
    
    % Check if the user pressed ENTER
    if isempty(button)
        break;
    end
    
    % Store the clicked coordinates as a node
    nodes = [nodes; x, y];
    
    % Plot the node as a red circle
    hold on;
    plot(x, y, 'ro');
end

% Draw a rectangle using the nodes
if size(nodes, 1) == 2
    rectangle('Position', [nodes(1, 1), nodes(1, 2), nodes(2, 1) - nodes(1, 1), nodes(2, 2) - nodes(1, 2)], 'LineWidth', 2);
end

When you run this code, a figure window will appear, which you can click on to place nodes. Press the Enter key after placing all nodes. The code should draw a rectangle using the first two nodes you clicked.

Let me know if this solves your issue or if you encounter any problems.