To plot lines between points

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Bharath Bonala
Bharath Bonala 2015-3-26
回答: Ayush 2024-10-22
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

回答(1 个)

Ayush
Ayush 2024-10-22
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:

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