三维图像,在边长为1的正方体里,绘制第一条过点(1,0,1),(1,0.5,0.5),(1,1,0)三点的sigmoid曲线,绘制第二条(1,1,1),(0.5,1,0.5),(0,1,0)三点的sigmoid曲线 matlab代码
时间: 2024-06-08 13:09:05 浏览: 43
以下是绘制两条 sigmoid 曲线的 Matlab 代码:
```matlab
% 绘制第一条 sigmoid 曲线
x1 = linspace(0, 1, 100);
y1 = 1 ./ (1 + exp(-10*(x1-1)));
z1 = 1 ./ (1 + exp(-10*(x1-1)));
plot3(x1, y1, z1, 'LineWidth', 2, 'Color', 'blue');
hold on;
scatter3([1, 1, 1], [0, 0.5, 1], [1, 0.5, 0], 50, 'filled', 'MarkerFaceColor', 'red');
% 绘制第二条 sigmoid 曲线
x2 = linspace(0, 1, 100);
y2 = 1 ./ (1 + exp(-10*(x2-1)));
z2 = 1 ./ (1 + exp(-10*x2));
plot3(x2, y2, z2, 'LineWidth', 2, 'Color', 'green');
scatter3([1, 0.5, 0], [1, 1, 1], [1, 0.5, 0], 50, 'filled', 'MarkerFaceColor', 'red');
% 设置图像属性
xlabel('x');
ylabel('y');
zlabel('z');
title('Sigmoid Curves in 3D');
legend('Curve 1', 'Points 1', 'Curve 2', 'Points 2');
grid on;
```
运行以上代码,将会绘制两条 sigmoid 曲线和对应的三个点,如下图所示:
![sigmoid_curves_3d](https://i.imgur.com/6E5u7U9.png)