清空变量和图形窗口clear;clc;close all; 定义x和y范围x = linspace-05 05 100;y = linspace-05 05 100; 创建网格X Y = meshgridx y; 计算方程Z = X^2 + Y^2 - 05^2; 绘制图像contourX Y Z 0 0 LineWidth 2;axis equal;grid on;xlabelx;ylabely

% 清空变量和图形窗口 clear; clc; close all;

% 定义x和y范围 x = linspace(-1.5, 1.5, 100); y = linspace(-1.5, 1.5, 100);

% 创建网格 [X, Y] = meshgrid(x, y);

% 计算方程 Z = X.^2 + Y.^2 - 1^2;

% 绘制图像 contour(X, Y, Z, [0 0], 'LineWidth', 2); hold on;

% 绘制小点起点 plot(-1, 0, 'ro', 'MarkerSize', 5, 'MarkerFaceColor', 'r');

% 设置小点运动轨迹 theta = linspace(0, 2*pi, 100); x_traj = cos(theta); y_traj = sin(theta);

% 绘制小点运动轨迹 plot(x_traj, y_traj, 'b', 'LineWidth', 2);

axis equal; grid on; xlabel('x'); ylabel('y'); title('x^2 + y^2 = 1^2'); legend('x^2 + y^2 = 1^2', '起点', '运动轨迹')