> [[1,2,3],[2,3,4],[3,4,1],[4,1,2]] > > Is this a bug or the syntax is non-standard? In the second case which > is the right one? > The syntax is non standard. You need to use the RESHAPE intrinsic, like this: RESHAPE ([3,2], [1,2,3,2,3,4,3,4,1,4,1,2]) FX -- François-Xavier Coudert http://www.homepages.ucl.ac.uk/~uccafco/