ons</span>
0008 <span class="comment">% field - plot field instead of N.r</span>
0009 
0010 <span class="keyword">if</span> nargin&lt;2, feld=N.r; <span class="keyword">end</span>
0011 <span class="keyword">if</span> nargin&lt;3, mal=struct(<span class="string">'xdir'</span>,0,<span class="string">'ydir'</span>,0,<span class="string">'vie'</span>,0); <span class="keyword">end</span>
0012 <span class="keyword">if</span> ~isfield(mal,<span class="string">'vie'</span>), mal.vie=1; <span class="keyword">end</sp