Algorithm 5 Group Division

Require:$r[m+1]=\{r_0,r_1,\dots ,r_m\}$ Ensure:$\mathbf{G}=\{{\mathbf{G}}_1,{\mathbf{G}}_2,\cdots ,{\mathbf{G}}_g\}$   initialize $N=m+1,D_{max}=1.96,g=1$   initialize arrays $D_i\left[N\right]$   compute $\mu$ and $\sigma$   add $r_0$ into ${\mathbf{G}}_1$   for ($i=1\mathrm{to}m$) do     $D_i\left[i\right]=\frac{|r_i-\mu |}{\sigma }$     if ($D_{max}<D_i\left[i\right]$) then       $g=g+1$       add $r_i$ into ${\mathbf{G}}_g$       update $\mu ,\sigma$     else       add $r_i$ into ${\mathbf{G}}_g$     end if   end for