How to use the same equation to get shapes of different sizes and locations.

Hi,

I'm trying to get 3 circles stacked ontop of eachother (a snowman) each of a different size (heights of: 80, 50, 30). I'm not sure how to use the same equation (given below) for each of the different parameters. I've tried using a matrix but matlab isn't liking that. Am I making an obvious mistake?

I want to make it look neat so don't want to write out the same equation multiple times.

angles = linspace(0, 2*pi, 500);
radius = [40 25 15];
CenterX = [0 0 0];
CenterY = [40 105 145];

x = radius * cos(angles) + CenterX;
y = radius * sin(angles) + CenterY;

plot(x, y, 'b-', 'LineWidth', 2);
hold on;
plot(CenterX, CenterY, 'k+', 'LineWidth', 3, 'MarkerSize', 14);
grid on;
axis equal;
xlabel('X', 'FontSize', 14);
ylabel('Y', 'FontSize', 14);

Answer 1

[VBBV]

Try this

angles = linspace(0, 2*pi, 500);
radius = [40 25 15];
CenterX = [0 0 0];
CenterY = [40 105 145];

for i = 1:length(radius)
	for j = 1:length(angles)
      x(i,j) = radius(i)*cos(angles(j)) + CenterX(i);
	  y(i,j) = radius(i)*sin(angles(j)) + CenterY(i);
	end
end
plot(x(1,:), y(1,:), 'b-',x(2,:), y(2,:),'b', x(3,:), y(3,:),'b','LineWidth', 2); 
hold on
plot(CenterX, CenterY, 'b+', 'LineWidth', 3, 'MarkerSize', 14);
grid
axis equal;
xlabel('X', 'FontSize', 14);
ylabel('Y', 'FontSize', 14);

Answer 2

[Mathieu NOE]

hi

this is my suggestion

radius = [40 25 15];
CenterX = [0 0 0];
CenterY = [40 105 145];

for ci = 1:length(radius)
	[x,y] = XY(radius(ci),CenterX(ci),CenterY(ci));
	plot(x, y, 'b-', 'LineWidth', 2);
	hold on;
	plot(CenterX, CenterY, 'k+', 'LineWidth', 3, 'MarkerSize', 14);
	grid on;
	axis equal;
	xlabel('X', 'FontSize', 14);
	ylabel('Y', 'FontSize', 14);
end


function [x,y] = XY(radius,CenterX,CenterY)

samples = 360;
angles = (0:samples-1)/samples*2*pi;

x = radius * cos(angles) + CenterX;
y = radius * sin(angles) + CenterY;

end