作业帮为什么这段程序在MATLAB理没有图像输出啊,输出的是空白的图f=sym('exp(-2*t)*exp(j*2*t)*heaviside(t)');F=fourier(f);FT=subs(F,[-2*pi:0.01*pi:2*pi]);subplot(2,1,1);plot([-2*pi:0.01*pi:2*pi],abs(FT));title('f(t)的幅频特性曲线'
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/05 20:08:27
![为什么这段程序在MATLAB理没有图像输出啊,输出的是空白的图f=sym('exp(-2*t)*exp(j*2*t)*heaviside(t)');F=fourier(f);FT=subs(F,[-2*pi:0.01*pi:2*pi]);subplot(2,1,1);plot([-2*pi:0.01*pi:2*pi],abs(FT));title('f(t)的幅频特性曲线'](/uploads/image/z/10905123-3-3.jpg?t=%E4%B8%BA%E4%BB%80%E4%B9%88%E8%BF%99%E6%AE%B5%E7%A8%8B%E5%BA%8F%E5%9C%A8MATLAB%E7%90%86%E6%B2%A1%E6%9C%89%E5%9B%BE%E5%83%8F%E8%BE%93%E5%87%BA%E5%95%8A%2C%E8%BE%93%E5%87%BA%E7%9A%84%E6%98%AF%E7%A9%BA%E7%99%BD%E7%9A%84%E5%9B%BEf%3Dsym%28%27exp%28-2%2At%29%2Aexp%28j%2A2%2At%29%2Aheaviside%28t%29%27%29%3BF%3Dfourier%28f%29%3BFT%3Dsubs%28F%2C%5B-2%2Api%3A0.01%2Api%3A2%2Api%5D%29%3Bsubplot%282%2C1%2C1%29%3Bplot%28%5B-2%2Api%3A0.01%2Api%3A2%2Api%5D%2Cabs%28FT%29%29%3Btitle%28%27f%28t%29%E7%9A%84%E5%B9%85%E9%A2%91%E7%89%B9%E6%80%A7%E6%9B%B2%E7%BA%BF%27)
为什么这段程序在MATLAB理没有图像输出啊,输出的是空白的图f=sym('exp(-2*t)*exp(j*2*t)*heaviside(t)');F=fourier(f);FT=subs(F,[-2*pi:0.01*pi:2*pi]);subplot(2,1,1);plot([-2*pi:0.01*pi:2*pi],abs(FT));title('f(t)的幅频特性曲线'
为什么这段程序在MATLAB理没有图像输出啊,输出的是空白的图
f=sym('exp(-2*t)*exp(j*2*t)*heaviside(t)');
F=fourier(f);
FT=subs(F,[-2*pi:0.01*pi:2*pi]);
subplot(2,1,1);
plot([-2*pi:0.01*pi:2*pi],abs(FT));
title('f(t)的幅频特性曲线');
xlabel('w');
ylabel('幅度');
xlabel('w');
ylabel('幅度');
subplot(2,1,2);
plot([-2*pi:0.01*pi:2*pi],angle(FT));
title('f(t)的相频曲线');
xlable('w');ylable('相位（弧度）');
grid on;
为什么这段程序在MATLAB理没有图像输出啊,输出的是空白的图f=sym('exp(-2*t)*exp(j*2*t)*heaviside(t)');F=fourier(f);FT=subs(F,[-2*pi:0.01*pi:2*pi]);subplot(2,1,1);plot([-2*pi:0.01*pi:2*pi],abs(FT));title('f(t)的幅频特性曲线'
可以运行啊.不过你的倒数第二行写错了xlabel..ylabel..