Hi there, have a look at the manual on p.104 "series sname = mspec where sname is the name of the series to create and mspec is the name of the matrix to copy from, possibly followed by a matrix selection expression. Here are two examples. series s = x series u1 = U[,1] It is assumed that x and U are pre-existing matrices. In the second example the series u1 is formed from the first column of the matrix U. For this operation to work, the matrix (or matrix selection) must be a*vector with length equal to** **either the full length of the current dataset, n, or the length of the current sample range**, n0*. If n0 < n then only n0 elements are drawn from the matrix; if the matrix or selection comprises n elements, the n0 values starting at element t1 are used, where t1 represents the starting observation of the sample range. Any values in the series that are not assigned from the matrix are set to the missing code. " <hansl> nulldata *20* matrix test=mnormal(*20*,2) series sY1=test[,1] nulldata *21* smpl 1*20* matrix test=mnormal(*20*,2) series sY1=test[,1] smpl full print sY1 --byobs <hansl> Cheers Leon Am 21.10.2012 14:04, schrieb mariusz doszyn':