Algorithm 2 Scale Factor Discarding And Joining.

Require:H—the output from Algorithm 1, $\eta$—the range threshold (default: $\eta =0.01$, $\varphi$—the frequency threshold (default: $\varphi =3$), n—is the length of the array H) 1:for$i\leftarrow 0\mathbf{to}n-2$do 2:    if $H.f_i>0$ then 3:        $s\leftarrow H.s_i$ 4:        $f\leftarrow H.f_i$ 5:        $\mathsf{\Psi }\leftarrow H.{\mathsf{\Psi }}_i$ 6:        for $j\leftarrow 0\mathbf{to}n-1$ do 7:           if $H.f_j>\varphi \&|s-H.s_j|<\eta$ then 8:               $s\leftarrow (sf+H.s_{j}H.f_j)/(f+H.f_j)$ 9:               $f\leftarrow f+H.f_j$ 10:               $\mathsf{\Psi }\leftarrow \mathsf{\Psi }\cup H.{\mathsf{\Psi }}_j$ 11:               $H.f_j\leftarrow 0$ 12:           end if 13:        end for 14:        $H.s_i\leftarrow s$ 15:        $H.f_i\leftarrow f$ 16:        $H.{\mathsf{\Psi }}_i\leftarrow \mathsf{\Psi }$ 17:    end if 18:end for