Arrow of a vector ( r, theta) from a point (x,y).

Hello,

I need to show a arrow of a vector (r, theta) form a point (x,y). Is there any function to do that?

Thanks for help.

[Mathieu NOE]

hello

look in the FEX section and search for "arrow"

File Exchange - MATLAB Central (mathworks.com)

Answer 1

[Star Strider]

One approach (using the quiver function) —

x = rand

x = 0.3732

y = rand

y = 0.5120

r = rand

r = 0.9137

theta = 30;                                                     % Angle In Degrees

figure
quiver(x, y, r*cos(deg2rad(theta)), r*sin(deg2rad(theta)))
axis([0  2    0  2])
grid

Experiment to get different results.

.

[Bipul Biswas]

Thanks for the response. This works.

[Star Strider]

As always, my pleasure!

.

Answer 2

[the cyclist]

You can make an arrow on a plot using the annotation function, or you may want to use a quiver plot if you want the arrow to come from the data itself.