tatistics. You can call <cite>stats</cite> with no argument to see the list of variables (and standard format).    
The options are:
<a href="#id1"><span class="problematic" id="id2">*</span></a>scalar: use a preset (=1 basic statistics, =2 for extended statistics) single level list of integer indices (e.g. =[0,1]): it is applied only to data. 
* two-level nested list (e.g. =[[0,1]]) and the outer list has a single element, the selection is used replicated to data, x, y. 
* 3-element nested list =[[0,1],[1]