Direction of display of loop

t = linspace(0,2*pi);
x = cos(t)*sqrt(5);
y = sin(t)*sqrt(5/2);
plot(x,y)

The above code is generating a circle. I want to know the direction it is rotating. How can I do it in Matlab?

Answer 1

[Andrew Newell]

How about this?

t = linspace(0,2*pi);
x = cos(t)*sqrt(5);
y = sin(t)*sqrt(5/2);
plot(x,y); hold on
quiver(x(1),y(1),x(2)-x(1),y(2)-y(1),10)

Answer 2

[Doug Hull]

t = linspace(0,2*pi);
x = cos(t)*sqrt(5);
y = sin(t)*sqrt(5/2);

comet(x,y)

[Raviteja]

I want to know the direction after the plot is completed.

I need direction in static plot.

Can you suggest me anything?

Answer 3

[Paulo Silva]

t = linspace(0,2*pi);
x = cos(t)*sqrt(5);
y = sin(t)*sqrt(5/2);
plot(x,y)
%text showing the location of 3 points
text(x(1),y(1),'\leftarrow  1')
text(x(10),y(10),'\leftarrow 10')
text(x(30),y(30),'\leftarrow 30')
%arrow showing the direction of the "loop"
if y(1)<y(10)
xlabel('it''s rotating counterclockwise')    
text(x(1),y(1),'\uparrow','FontSize',18) %draw arrow
else
xlabel('it''s rotating clockwise')  
text(x(1),y(1),'\downarrow','FontSize',18) %draw arrow
end

[Raviteja]

So, Do we need to give some locations to show its direction?

Because I am using one zig zag map near about 20000 samples . Then how many times I have to define the different points as you told?

Is there any other method to to aromatically show directions with arrows or any other?

[Paulo Silva]

I updated the code, the part with the if statement does what you need?

[Raviteja]

It is working! Thanks!