function of mconv

a = [3,11,7,0,-1,4,2]
ax= [-3:3]
b= [2,3,0,-5,2,1]
bx = [-1:4]
[v,z]= mconv(a,ax,b,bx)


function[y,ny] = mconv(x,nx,h,hx)
nyb = nx(1)+ hx(1)
nye = nx(length(nx))+ hx(length(hx))
ny = [nyb:nye]
y = conv(x,h)
end