How to Draw an Ellipse Flower like this?

I need to draw 8 ellipses on the same grid and the angle of deviation between each of them must be pi/8. I have attached a flower with 18 leaves and I need to make one with 8 leaves. Each 'leave' is an ellipse.

Thanks in advance and greetings

Answer 1

[Image Analyst]

My attached demo does exactly that. Just adapt it to change the angle increment and center point.

[Miguiussss]

I'm new to matlab. Exactly what do I have to do with the code that you have attached to me?

[Miguiussss]

This is exactly what i have to do:

Starting from a center ellipse, the origin and half-axes a = 5, b = 2, create a script that generates a graph that contains n total ellipses of the same size, so that all of them are centered on the origin and angle between the Half-axes greater than two consecutive ellipses are π / n radians. This creates a kind of flower of n leaves. The input must be the number of sheets and output the graph, as in the following example. n must be = 8

[Image Analyst]

I adapted it for you.

% Demo to rotate an ellipse over an image.
% By ImageAnalyst
clc;    % Clear the command window.
close all;  % Close all figures (except those of imtool.)
imtool close all;  % Close all imtool figures.
clear;  % Erase all existing variables.
workspace;  % Make sure the workspace panel is showing.

hEllipse = imellipse(gca, [-5, -2, 5*2, 2*2]); % Second argument defines ellipse shape and position.
% Create a binary image ("mask") from the ROI object.
disp(hEllipse);
xy = hEllipse.getVertices();
x = xy(:,1);
y = xy(:,2);
xCenter = mean(x)
yCenter = mean(y)
plot(x, y);
axis equal;
% Set up figure properties:
% Enlarge figure to full screen.
set(gcf, 'Units', 'Normalized', 'OuterPosition', [0 0 1 1]);
% Get rid of tool bar and pulldown menus that are along top of figure.
set(gcf, 'Toolbar', 'none', 'Menu', 'none');

x = x - xCenter;
y = y - yCenter;
xy = [x y];
n = 8;
for theta = 0 : 180/n : 180 - 180/n
  fprintf('Theta = %f\n', theta);
  rotationArray = [cosd(theta) sind(theta); -sind(theta) cosd(theta)];
  rotated_xy = xy * rotationArray;
  x = rotated_xy(:,1);
  y = rotated_xy(:,2);
  plot(x, y, 'b-', 'LineWidth', 2);
  hold on;
end
ax = gca
grid on;
ax.XAxisLocation = 'origin';
ax.YAxisLocation = 'origin';
ax.XTick = -5:5
ax.YTick = -6:6
axis square;

[Miguiussss]

Thank you so much my friend! I would not have been able to adapt it on my own. I apreciate you so much!!!