On Fri, May 20, 2022 at 9:03 AM Sven Schreiber <svetosch(a)gmx.net&gt; wrote: > > I'm stumbling over the following behavior, which I can't rationalize. In > short, using an indexing vector to pick certain elements of a list works > with {1,2}, but fails with {1,3}. (Yes, the list has three elements as > printed out by the example code.) > > Or is indexing into a list not really supported but only working by > chance sometimes? > > <hansl> > open denmark > list L = LRM LRY IBO > list L print > list temp = L[{1,2}] # works > list temp print > temp = L[{1,3}] # fails > list temp print > </hansl> Indexation into a list via a selection vector is not supported, It's working by chance when the indexation vector {1,2} collapses to the simple range specifier [1:2]. A simple range specifier is supported.