Hello all, greetings from Paris ! I am currently working on my spatial scripts under win snapshot. I have trouble with scripts that used to work properly. The problem is that I cannot declare a matrix calling either a list or the variable references. Here is what GRETL tells when I declare a matrix V4 = {13, 14, 15, 16} variables 13-16 are intergers listing the observation number of each 4 nearest neighbors for my 257 data points. #list ppv4 = 13 14 15 16 #list ppv8 = 17 18 19 20 21 22 23 24 ? matrix V4 = {13, 14, 15, 16} Data types not conformable for operation Error executing script: halting It used to work properly with the same script and data in an earlier version. I wonder what is wrong, or may be I should declare my variables as descrete ? cheers Franck -- Franck Nadaud Economiste CIRED UMR 8568 CNRS - EHESS 45 bis avenue de la Belle Gabrielle 94736 Nogent-sur-Marne Cedex TEL 33-1-43-94-73-94 FAX: 33-1-43-94-73-70 MOB: 06-07-39-92-75 France