compute the unit vector given the angle

9 次查看（过去 30 天）
zhang
zhang 2012-5-4
编辑： Walter Roberson 2018-12-10
Hi guys,
How to compute the unit vector given the direction? Is there any function in matlab to do this task.
Thanks

请先登录，再回答此问题。

回答（3 个）

Walter Roberson
Walter Roberson 2012-5-4
编辑：Walter Roberson 2018-12-10
For angle theta in radians,
%[x, y] = pol2cart(1, theta); %-> incorrect
[x, y] = pol2cart(theta, 1); %repaired
  3 个评论
显示 1更早的评论
Kye Taylor
Kye Taylor 2012-5-4
It's unusual that the inputs to the function don't match the "r-theta" convention that is used so often to identify the coordinate space.

请先登录，再进行评论。

Roger Stafford
Roger Stafford 2016-1-9
If vector 'v' points in the desired direction, then do this to make it a unit vector:
v = v/norm(v);
Kye Taylor
Kye Taylor 2012-5-4
Given the angle
theta
in radians (counter-clockwise is positive theta, theta = 0 points in the positive x-direction) your unit vector is
u = [cos(theta),sin(theta)]

类别

在 Help Center 和 File Exchange 中查找有关 Creating and Concatenating Matrices 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by