How to rotate an arrow in animation?

Question

Shuvagata Saha 2017-11-29

0
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回答： Bob Blaine 2017-12-18

I am trying to create an animation showing the rotation of an arrow about the centre. The arrow is to rotate 360 degree. Which function do I have to use to show the animation? The code is given below:

if true
  clc; close all;clear all;
t = 0: (2*pi) / 100: 2*pi; %Creating points
a = cos(t) + sin(t)*i;     %Finding the points 
compass(a);                %Creating the arrow
end

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Answer 1

Bob Blaine 2017-12-18

2
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Hi Shuvagata,

MATLAB graphics doesn't directly have an animation function, but a fairly simple 'for' loop can be implemented to do animations:

if true
  clc; close all;clear all;
t = 0: (2*pi) / 100: 2*pi; %Creating points
a = cos(t) + sin(t)*i;     %Finding the points 
for i=1:size(a,2)
  compass(a(i));
  drawnow;
end