[Gretl-users] random walk

Hi, I need to do a simple thing which seemed to work before, but now it's not. Suppose I have a work space with the S&P 500 closing numbers by month. I now want to create a random walk. I used genr y = 0 genr y = y(-1) + randgen(N, 0, 1) but it doesn't like the ( in the y(-1). How can I get this to work? Thanks, Walt -- ________________________ Walter R. Paczkowski, Ph.D. Data Analytics Corp. 44 Hamilton Lane Plainsboro, NJ 08536 ________________________ (V) 609-936-8999 (F) 609-936-3733 walt(a)dataanalyticscorp.com www.dataanalyticscorp.com