Hi, How can i plot a circle of radius 1 and Explain the code fully please if you do not mind

Hi, How can i plot a circle of radius 1 and Explain the code fully please if you do not mind

Answer 1

[Star Strider]

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

Then plot ‘y’ as a function of ‘x’.

To make it look like a circle in your plot, see the documentation on the axis function.

Answer 2

[Waleed Alrabghi]

Could you please emphasize more Mr.star.

[Walter Roberson]

axis equal

Or

set(gca, 'DataAspectRatio', [1 1 1])

The default is that X and Y are on different scales, which has the effect of making circles look like ellipses when they are plotted.

[Star Strider]

The calculations are basic analytic geometry. Around a circle, the x-coordinate is cos(angle) and the y-coordinate is sin(angle). Then all you do is plot the corresponding x and y points in each vector, and your circle magickally appears! (It will actually look like a circle rather than an ellipse if you follow Walter Roberson’s advise, and my hint.) The angle vector, ‘t’ in my code, is a ‘parameter’, and ‘x’ and ‘y’ are the resulting parametric equations for the circle.

I demonstrated plotting in my Answer to your earlier Question, so I will not repeat that here.

Answer 3

[Walter Roberson]

http://matlab.wikia.com/wiki/FAQ#How_do_I_create_a_circle.3F