填充图动画（极性功能）

发布于 2025-01-23 14:18:37 字数 498 浏览 0 评论 0原文

我在作业中显示了一组视频。该动画是如何创建的？我正在尝试创建类似的东西。以下是我的尝试；它只是绘图线，因为我相信它没有填充正确的输入。指导将不胜感激

clear;close all;

th = 0:0.1:pi*2
r = cos(2*th) .* sin(2*th);
x = r .* cos(th);
y = r .* sin(th);
plot(x,y);
hold on

for th = 0:0.1:pi*2
  x0 = [r .* cos(th)];
  y0 = [r .* sin(th)];
  fill(x0,y0,'b');
  pause (0.5);
end
hold off

原文

I have a set of videos shown in an assignment. How is this animation created? I am trying to create something similar. Below is my attempt; it is only drawing lines because I believe it is not filling in the correct inputs. Guidance would be much appreciated

clear;close all;

th = 0:0.1:pi*2
r = cos(2*th) .* sin(2*th);
x = r .* cos(th);
y = r .* sin(th);
plot(x,y);
hold on

for th = 0:0.1:pi*2
  x0 = [r .* cos(th)];
  y0 = [r .* sin(th)];
  fill(x0,y0,'b');
  pause (0.5);
end
hold off

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停顿的约定 2025-01-30 14:18:37

我设法用Polarplot（Th，Radius）在极性坐标中绘制该功能，我无法填充黄色，也不会使图动画，对不起。

clear;close all;

th = linspace(0, 2*pi, 1000);

r = cos(2 .* th) .* sin(2 .* th);

polarplot(th,r)

I managed to draw the function in polar coordinates with polarplot(th, radius), I could not fill with yellow color and neither animate the graph, I'm sorry.

clear;close all;

th = linspace(0, 2*pi, 1000);

r = cos(2 .* th) .* sin(2 .* th);

polarplot(th,r)

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梨涡少年 2025-01-30 14:18:37

可以通过填写列表来绘制类似的动画。将clf放在前面的循环中是可选的。

以下代码动画了一朵小花的绘图过程。通过更改轴，花将看起来比例更大或更小。

X = 0:0.01:pi*2;
r = cos(2*X).*sin(2*X);

x=r.*(cos(X));
y=r.*(sin(X));

x_1 = []; y_1 = [];

for i=1:629                    %629 is the size of x and of y
    x_1 = [x(i), x_1];
    y_1 = [y(i), y_1];
    
    fill(x_1,y_1,'b'); hold on;
    axis([-2 2 -2 2]); hold on;
    pause(0.01);
end

A similar animation can be drawn by filling from lists. Putting clf in the for-loop is optional.

This following code animates the drawing process of a small flower. The flower will look proportionally bigger or smaller by changing the axis.

X = 0:0.01:pi*2;
r = cos(2*X).*sin(2*X);

x=r.*(cos(X));
y=r.*(sin(X));

x_1 = []; y_1 = [];

for i=1:629                    %629 is the size of x and of y
    x_1 = [x(i), x_1];
    y_1 = [y(i), y_1];
    
    fill(x_1,y_1,'b'); hold on;
    axis([-2 2 -2 2]); hold on;
    pause(0.01);
end

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