dot(Expr)
dot(Expr,K)
If the input argument k
is not specified, this pseudofunction expands to
((Expr)/(Expr{-1}))
If the input argument k
is specified, it expands to
((Expr)/(Expr{k}))
The two derived expressions, Expr{-1}
and Expr{k}
, are based on Expr
, and have all its time subscripts shifted by --1 or by k
periods, respectively.
The following two lines
dot(Z)
dot(X+Y,-2)
will expand to
((Z)/(Z{-1}))
((X+Y)/(X{-2}+Y{-2}))