I want to draw an arrow in vector.

Q = [0,977 -0,016
-0,016 0,176];

p1 = [0.977 -0.016]; %Coordinate of the first point 
p2 =[-0.016 0.176]; % Coordinate of the second point

The start and end points of the arrow are as above. How can I draw a vector arrow with these points?

Answer 1

[Matevz Lavtar]

I have the same problem, so I make a function that solve this problem I think.

Here is a link to it: https://www.mathworks.com/matlabcentral/fileexchange/82665-plotting-vectors-with-arrow-head-pvec?s_tid=prof_contriblnk

Example what can you do with it:

Hope it helps you

Answer 2

[Jan]

Search in the FileExchange for the keyword "arrow":

https://www.mathworks.com/matlabcentral/fileexchange/?utf8=%E2%9C%93&term=arrow

[Muhendisleksi]

I checked all of them. But I could not find what I wanted.

[Jan]

If you explain exactly, what you want, it is possible for the readers to give any specific suggestions. The information, that the dozens of existing implementations do not satisfy your needs, does not allow for further help.

Answer 3

[Star Strider]

One option is the quiver plot:

Q = [0.977 -0.016
    -0.016 0.176];
QX = Q(:,1);                                            % Isolate Line ‘x’ Coordinates
QY = Q(:,2);                                            % Isolate Line ‘y’ Coordinates
[~,UV] = gradient(Q);                                   % Generate Gradient
UVX = [UV(1,1); 0];                                     % Define Quiver Arrow ‘x’
UVY = [UV(1,2); 0];                                     % Define Quiver Arrow ‘y’

figure(1)
% plot(QX, QY, '-r', 'LineWidth',1.2)                     % Plot Line (Optional)
hold on
quiver(QX, QY, UVX, UVY, 0)
hold off
axis([-0.15  1.1    -0.15  0.2])
axis equal
grid

EDIT — Added axis calls to the plot.

Answer 4

[Martin Meiringer]

Is there a reason why this functionality is still not built in? Using file exchange functions is always a bit difficult if you are sharing your work with colleagues. so please, Mathworks do a arrow / arrow3 function!!!

[Star Strider]

Submit an Enhandement Request at Contact Us (link).

[MrKnudsen]

Will my proposal further down work for you?

Answer 5

[MrKnudsen]

I think this hack might be useful:

figure()

hold on; grid on;

a1 = 1j+1;

a2 = -1;

a3 = -1j;

a4 = 0.5 -0.5j;

compass(a1,'r');

compass(a2,'g');

compass(a3,'b');

compass(a4,'y');