separate lines on 2d graph using two separate pairs of vectors

How do draw separate lines, one from x1, y1 to m1, n1, another from x2, y2 to m2, n2 and so on...?

Thanks so much!

Answer 1

[Fangjun Jiang]

line([x1,m1],[y1,n1]);
hold on;
line([x2,m2],[y2,n2]);

[Grzegorz Knor]

hold on is unnecessary in this case.

[Walter Roberson]

Correct, Grzegorz.

For future reference by other people reading this: line() always adds to the current graphics, no matter what the hold state is. plot(), however, pays attention to the hold state.

Answer 2

[Grzegorz Knor]

% generate some data
x1 = rand();
y1 = rand();
m1 = rand();
n1 = rand();
x2 = rand();
y2 = rand(); 
m2 = rand(); 
n2 = rand();
% option one
figure
line([x1 m1],[y1 n1],'color','b')
line([x2 m2],[y2 n2],'color',[0 0.498 0])
% option 2
figure
plot([x1 m1],[y1 n1],[x2 m2],[y2 n2])
% option 3
figure
hold all
plot([x1 m1],[y1 n1])
plot([x2 m2],[y2 n2])

[Hershy]

Thanks! So I guess that means that for long vectors I should do it with a for loop.

for i - 1:length(x)

figure

line([x(i) m(i)],[y(i) n(i)])

end

Thanks again!

[Walter Roberson]

line( reshape([x(:),m(:),nan(numel(x),1)].',1,[]), ...

reshape([y(:),n(:),nan(numel(x),1)].',1,[]) );

[Hershy]

Brilliant, Walter! Thank you so much!!