Matlab中函数句柄初一一个数提示出错Undefined operator './' for input arguments of type 'function_handle'.

Uft =

@(t)Af*cos(2*pi*fc*t+2*pi*deltaffp*integral(Smt,0,10)+Phi0)

Undefined operator ‘./’ for input arguments of type ‘function_handle’.

Error in moxingcanshuqiuqu (line 136)
U1st=Uft./N1u;

这个问题怎么解决啊。。。求助