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Date:   Sat, 6 Sep 1997 00:05:35 GMT
Reply-To:   Vincent Girard <vgirard@AGR.GOUV.QC.CA>
Sender:   "SAS(r) Discussion" <SAS-L@UGA.CC.UGA.EDU>
From:   Vincent Girard <vgirard@AGR.GOUV.QC.CA>
Organization:   CRED - MAPAQ
Subject:   derivative in Proc IML

Hello SAS-ler, any good idea to obtain more elegantly DMAT?

proc iml; MAT={23,22,25,34,56}; DMAT=.//MAT[2:nrow(MAT),]-MAT[1:(nrow(MAT)-1),];

MAT DMAT 23 . 22 -1 25 3 34 9 56 22

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