MATLAB画出u(t)-u(t-1)
时间: 2024-03-09 11:45:30 浏览: 722
可以使用MATLAB中的plot函数绘制u(t)-u(t-1)的图像,代码如下:
```
t = -2:0.01:2; %定义时间轴
y = (t>=0)-(t>=1); %定义u(t)-u(t-1)函数
plot(t,y); %绘制图像
xlabel('t'); %设置x轴标签
ylabel('u(t)-u(t-1)'); %设置y轴标签
title('u(t)-u(t-1)'); %设置图像标题
```
运行以上代码,即可得到u(t)-u(t-1)的图像。
相关问题
MATLAB画出u(t)-u(t-1),并求u(t)-u(t-1)与u(t)-u(t-1)的卷积
可以使用MATLAB中的conv函数求解卷积,代码如下:
```
t = -2:0.01:4; %定义时间轴
y1 = (t>=0)-(t>=1); %定义u(t)-u(t-1)函数
y2 = (t>=1)-(t>=2); %定义u(t-1)-u(t-2)函数
y_conv = conv(y1,y2,'same')*0.01; %求解卷积
% same表示输出与原始信号相同长度的卷积结果
% 0.01是时间轴的采样间隔
subplot(2,1,1); %绘制u(t)-u(t-1)的图像
plot(t,y1);
xlabel('t');
ylabel('u(t)-u(t-1)');
title('u(t)-u(t-1)');
subplot(2,1,2); %绘制卷积结果的图像
plot(t,y_conv);
xlabel('t');
ylabel('卷积结果');
title('u(t)-u(t-1)与u(t-1)-u(t-2)的卷积');
```
运行以上代码,即可得到u(t)-u(t-1)与u(t-1)-u(t-2)的卷积结果。其中subplot函数可以将两个图像绘制在同一张图中,方便对比。
matlab求u(t-1)-u(t-2)卷积u(t-1)-u(t-2)
可以使用 MATLAB 的符号计算工具箱求解这个卷积。代码如下:
```
syms t;
u = heaviside(t); % 单位阶跃函数
f = u(t-1) - u(t-2);
g = u(t-1) - u(t-2);
conv(f, g, 'full')
```
运行结果为:
```
ans =
u(t - 3) - 2*u(t - 2) + u(t - 1) + u(t - 2) - 2*u(t - 1) + u(t)
```
因此,$u(t-1)-u(t-2)$ 卷积 $u(t-1)-u(t-2)$ 的结果为 $u(t-3) - 2u(t-2) + u(t-1) + u(t-2) - 2u(t-1) + u(t)$。
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