我在命令窗口直接定义 function[y,ny]=conv_m(x,nx,h,nh)nyb=nx(1)+nh(1);nye=nx(length(x))+nh(length(h));ny=[nyb:nye];y=conv(x,h);但为什么老出??? function[y,ny]=conv_m(x,nx,h,nh) |Error: Function definitions are not permitted at the prompt or in scripts.现