Matlab 拉氏变换我的输出结果中怎么还有laplac.如：>> syms t s>> ft=sym('sin(t)*Heaviside(t)');>> Fs=laplace(ft)Fs =- (laplace(Heaviside(t),t,s - i)*i)/2 + (laplace(Heaviside(t),t,s + i)*i)/2这怎么让他算完?

Matlab 拉氏变换
我的输出结果中怎么还有laplac.
如：
>> syms t s
>> ft=sym('sin(t)*Heaviside(t)');
>> Fs=laplace(ft)
Fs =
- (laplace(Heaviside(t),t,s - i)*i)/2 + (laplace(Heaviside(t),t,s + i)*i)/2
这怎么让他算完?

将Heaviside函数写成matlab识别的 heaviside
>> syms t s
>> ft=sym('sin(t)*heaviside(t)');
>> Fs=laplace(ft)
Fs =
1/(s^2 + 1)