.- help for ^seq^ (STB-37: dm44) .- Sequences of integers - --------------------- ^seq^ newvar [^if^ exp] [^in^ range] [^, by(^byvar^) b^lock^(^#^) f^rom^(^#^)^ ^t^o^(^#^)^ ] Description - ----------- ^seq^ creates newvar containing one or more sequences of integers. It is principally useful for quick creation of observation identifiers or automatic numbering of levels of factors or categorical variables. Options - ------- ^by(^byvar^)^ specifies that ^seq^ is to generate the sequence within each group defined by the by variables. ^block(^#^)^ specifies that each integer is repeated in a block of #. The default is 1. ^from(^#^)^ specifies that integers start at #. The default is 1. ^to(^#^)^ specifies that integers stop at #. The default is _N, or the number of the last value reached as determined by whatever combination of ^by^, ^if^, and ^in^ has been issued. If there are more values, numbering restarts at the value set by ^from^. Examples - -------- . ^set obs 12^ . ^seq a^ . ^seq b, b(2)^ . ^seq c, t(6)^ . ^seq d, f(10) t(12)^ . ^seq e, f(3) t(1)^ The results are a b c d e 1. 1 1 1 10 3 2. 2 1 2 11 2 3. 3 2 3 12 1 4. 4 2 4 10 3 5. 5 3 5 11 2 6. 6 3 6 12 1 7. 7 4 1 10 3 8. 8 4 2 11 2 9. 9 5 3 12 1 10. 10 5 4 10 3 11. 11 6 5 11 2 12. 12 6 6 12 1 ^a^ also from ^gen a = _n^ or ^range a 1 12^ or ^range a 1 _N^ ^b^ ^gen b = 1 + int((_n - 1)/2)^ ^c^ ^gen c = 1 + mod(_n - 1, 6)^ ^d^ ^gen d = 10 + mod(_n - 1, 3)^ ^e^ ^gen e = 3 - mod(_n - 1, 3)^ Author - ------ Nicholas J. Cox, University of Durham, U.K. n.j.cox@@durham.ac.uk Also see - -------- STB: STB-37 dm44 On-line: help for @range@, @functions@