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发表于 2010-5-11 13:19:52
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用list吧8 p- m/ o9 Y0 g* j
patches-own [wealth rank]' Y) S: J3 W$ n4 {9 g8 _3 ]/ {
to setup
( ]% ]8 o+ m* J+ u4 h ca
# p- g% h0 @# H( t1 q/ M ask patches [set wealth random 100 set pcolor green ]& f! y+ Q4 p! e3 _) d& G5 S
end/ o' J" |& L/ z& T6 ]
. J! v4 ^% p/ L& t2 Dto go
$ o" ~! l0 J0 Q3 G. C. t let mylist1 []& [: |4 N+ g, a6 H! `
set mylist1 sort-by [[wealth] of ?1 < [wealth] of ?2] patches" n, h3 p( \& R; j( Q
let mylist2 []" [- y3 m0 [# p* _
set mylist2 n-values count patches [? + 1]0 n/ m7 F ^$ u) }/ r
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( foreach mylist1 mylist27 T1 Y N, u# V) X4 `# W6 Z. W0 ~, q) Y
[
8 x. ~! v b( k) w" g ask ?1[ set rank ?2]
" H L; O2 }' I2 N- N show [rank] of ?1
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+ \) @) p. a: X k )( f: q" ~* ^/ P) i: A' \
let mylist3 []: a( G3 `! X3 o) K" u' \! a
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set mylist3 sort-by [[rank] of ?1 < [rank] of ?2] patches; Y2 ?+ }3 v3 u- T* Q* R
show count patches
' S, I! f' W6 _& P+ H. C show mylist1
) K# c+ ]% W, Y( v4 i. }. ] show mylist3' X. J+ E) K4 S, V. c/ v, i3 R
end: m2 P' A! [& Q7 p- I$ d1 z
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这时的mylist1 和mylist3 应该是一样的 |
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