Help in Matlab Assigment (Plot Circles)
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First Plot Circles
a-) Write MATLAB function called [x,y]=createCircle(center,r). The circle should be centered at center (1x2 row vector). Return x and y coordinates of the circle and then plot the circle. Remember that for a circle at origin (0,0) following equation is true
x(t) = cos(t)
y(t) = sin(t) for t = [0,2π].
Now, you need to find out how to scale and translate the circle.
Second
5 个评论
Adam Danz
2019-12-23
We don't do other people's homework. After you get this started on your own, if you get stuck, show us your code and explain what's wrong and we can give you hints.
Enes Balci
2019-12-23
Adam Danz
2019-12-23
That function should plot a circle centered at (x,y) with radius r.
Image Analyst
2019-12-23
It should (is supposed to), but it doesn't. And it should also take and return vectors, which it doesn't yet.
Close, but see my corrections in my answer below.
ah, well, t needs to be incremented and axis equal will help, too.
t = 0:.01:2*pi; % or linspace()
采纳的回答
Image Analyst
2019-12-23
This is a frequently asked question, so see the FAQ
For your code, you need to modify it to take more points because going from 0 to 2*pi in steps of 1 makes for a pretty chunky circle. Make it like 1000 steps with linspace(). You also need to add x center to xunit and the y center to yunit to get the center in the right place, and pass in a 1x2 vector and pass out the coordinates of the circle's perimeter.
function [xunit, yunit] = circle(xy,r)
hold on
t = linspace(0, 2*pi, 1000); % 1000 points between 0 and 2*pi
xunit = r * cos(t) + xy(1);
yunit = r * sin(t) + xy(2);
plot(xunit, yunit);
grid on;
hold off
Then you call call it like
[x, y] = circle([10, 20], 5)
1 个评论
Adam Danz
2019-12-23
axis equal
so it looks like a circle
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