To plot lines between points

I have a matrix

M = [a b; c d; e f]

these values are a,b,c,d,e,f are obtained from selecting random points on an image using 'getpts' command

The values are large and decimal, as i'm selecting them from an image

I need to draw(plot) 2 lines between (a,b),(c,d) and (a,b), (e,f)

need help

Answer 1

[Ayush]

Hi,

To plot two lines between the points ((a, b)), ((c, d)), and ((e, f)) in MATLAB, you can use the “plot” function. Refer to an example code below for better understanding:

% Example coordinates
M = [100.5, 200.3; 150.7, 250.8; 120.9, 180.4];

% Extract points
a = M(1, 1);
b = M(1, 2);
c = M(2, 1);
d = M(2, 2);
e = M(3, 1);
f = M(3, 2);

% Plot the lines
figure; % Create a new figure window
hold on; % Hold on to plot multiple lines

% Plot line between (a, b) and (c, d)
plot([a c], [b d], 'r-', 'LineWidth', 2); % Red line with width 2

% Plot line between (a, b) and (e, f)
plot([a e], [b f], 'b-', 'LineWidth', 2); % Blue line with width 2

% Add labels and title for clarity
xlabel('X-axis');
ylabel('Y-axis');
title('Lines between Selected Points');
legend('(a,b) to (c,d)', '(a,b) to (e,f)');

% Display grid
grid on;

hold off;

For more information on the “plot” function you can refer to the below documentation:

https://www.mathworks.com/help/matlab/ref/plot.html