\begin{Schunk}
\begin{Sinput}
 ps30 <- plotPlane(m0, plotx1 = "x1", plotx2 = "x2", lcol = gray(.7), theta = 270, phi = 25)
 addLines(from = ps20, to = ps30, col = ps20$col)
\end{Sinput}
\begin{Soutput}
NULL
\end{Soutput}
\end{Schunk}
