Assignment has more non-singleton rhs dimensions than non-singleton subscripts

 Reh=zeros(length (Dd),N1);
Rec=zeros(length (Dd),N1);
 for i=1:1:N1
for j=1:1:length(Dd)
 Reh(j,i)=(dh(i)*vh*Dh(j))/uh(i);              
 Rec(j,i)=(dc(i)*vc*Dc(j))/uc(i);
end
end
There are two variable. I think I missed to properly initialised the Rec and Reh matrix. 
Could you please help me to know how to initialized matrix. 
Its showing error" Assignment has more non-singleton rhs dimensions than non-singleton subscripts"