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Colleagues, =20 In using the paste command I have to spell out the collapse option: =20 > paste(1:3,coll=3D"a") [1] "1 a" "2 a" "3 a" > paste(1:3,collapse=3D"a") [1] "1a2a3" =20 My understanding is that the abbreviation coll should be adequate. Actually, even collaps isn't enough: =20 paste(1:3,collaps=3D"a") [1] "1 a" "2 a" "3 a" =20 LG =20 Lionel Galway, Ph.D. Senior Statistician The RAND Corporation vo...