作业帮MATLAB画不出该图像：代码如下：syms tf1=heaviside(t+1)-heaviside(t-1)f2=cos(10*pi*t)f3=f1*f2F=fourier(f3)ezplot(F,[-10 10])
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![MATLAB画不出该图像：代码如下：syms tf1=heaviside(t+1)-heaviside(t-1)f2=cos(10*pi*t)f3=f1*f2F=fourier(f3)ezplot(F,[-10 10])](/uploads/image/z/10908953-17-3.jpg?t=MATLAB%E7%94%BB%E4%B8%8D%E5%87%BA%E8%AF%A5%E5%9B%BE%E5%83%8F%EF%BC%9A%E4%BB%A3%E7%A0%81%E5%A6%82%E4%B8%8B%EF%BC%9Asyms+tf1%3Dheaviside%28t%2B1%29-heaviside%28t-1%29f2%3Dcos%2810%2Api%2At%29f3%3Df1%2Af2F%3Dfourier%28f3%29ezplot%28F%2C%5B-10+10%5D%29)
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这是在2011b上求的结果：F = - (sin(w)*i)/(pi*10*i - w*i) + (sin(w)*i)/(pi*10*i + w*i)
syms wF = - (sin(w)*i)/(pi*10*i - w*i) + (sin(w)*i)/(pi*10*i + w*i)F1 = simple(F)F1 = -(2*w*sin(w))/(- w^2 + 100*pi^2)结果对不对?
MATLAB画不出该图像：代码如下：syms tf1=heaviside(t+1)-heaviside(t-1)f2=cos(10*pi*t)f3=f1*f2F=fourier(f3)ezplot(F,[-10 10])
MATLAB画不出该图像：代码如下：
syms t
f1=heaviside(t+1)-heaviside(t-1)
f2=cos(10*pi*t)
f3=f1*f2
F=fourier(f3)
ezplot(F,[-10 10])
MATLAB画不出该图像：代码如下：syms tf1=heaviside(t+1)-heaviside(t-1)f2=cos(10*pi*t)f3=f1*f2F=fourier(f3)ezplot(F,[-10 10])
这是在7.1.上求的结果：F =2*w/(w+10*pi)/(w-10*pi)*sin(w)
这是在2011b上求的结果：F = - (sin(w)*i)/(pi*10*i - w*i) + (sin(w)*i)/(pi*10*i + w*i)
syms wF = - (sin(w)*i)/(pi*10*i - w*i) + (sin(w)*i)/(pi*10*i + w*i)F1 = simple(F)F1 = -(2*w*sin(w))/(- w^2 + 100*pi^2)结果对不对?