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[交流] 关于turtle的使用问题

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发表于 2008-3-14 16:14:39 | 显示全部楼层 |阅读模式
我将customer设为 turtles-own,初始值赋为-1,为的是当turtle遇到同伴时就将其中的一个turtle认为自己的customer,然后进行交易,如下:
! I! |3 l& x5 ]# ^7 o( Cto do-business + o' X0 z  g5 t6 D9 D# T
rt random 360. L; V/ b; ~3 q' ^; ?
fd 1$ N! X% M( L  `. b$ P. x
ifelse(other turtles-here != nobody)[* V/ I2 i3 z& N' x1 p
   set customer one-of other turtles-here ;;这样一来,customer不代表了一个turtle吗?但在运行时出现了问题.
, L; [# K$ ]1 |  R   set [trade-record-one] of self item (([who] of customer) - 1)  [trade-record-all]of self    8 P) t5 L8 ~! S4 V9 E5 e
   set [trade-record-one] of customer item (([who] of self) - 1)  [trade-record-all]of customer( O9 D' j1 d, D4 s) x+ c
   set [trade-record-one-len] of self length [trade-record-one] of self
) E, f, C" e' |  @; r! s   set trade-record-current( list (timer) (random money-upper-limit))
7 j; ^" P( k' f" D5 f7 w$ U1 ?
问题的提示如下:% T  o* S4 Q( ]+ |+ ?! O9 U
3 K# y) G+ K9 J" Z
error while turtle 50 running OF in procedure DO-BUSINESS8 n) e% H7 y) R! |0 E! F8 `
  called by procedure GO
% |  a- v" `! q0 X' l7 U8 q$ w" yOF expected input to be a turtle agentset or turtle but got NOBODY instead.
( ?# ]" T+ i5 s$ z* _$ F
(halted running of go)# A7 e, ]# g/ K4 ?& y+ r

- A% l+ ~- }8 h! P5 `# o这是为什么呢?我看到一些netlogo中自带的例子也是用这种方法来找turtle的同伴的啊?期待高手解答~~
& L, ~) O) k- w! H$ B- Q4 f另外,我用([who] of customer)来获取turtle的编号的方法对的吗?如  set [trade-record-one] of self item (([who] of customer) - 1)  [trade-record-all]of self    中.

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发表于 2008-3-17 17:34:20 | 显示全部楼层

资料不全

你把你的所有程序传上来我看一下,估计不是大问题。(南京大学)
 楼主| 发表于 2008-3-18 13:10:54 | 显示全部楼层
你好,这是我现在正在写着的程序,以上问题就在其中,请多指教' D. Y  H8 @" `( F2 ]) z
globals[" @2 t8 ?4 ]: F2 t! [
xmax
$ T6 T" u. A  g- F& Uymax
( Y1 J! f6 o( e: _global-reputation-list3 b  @0 s- B7 p" [: U/ e2 A
1 o, O0 N6 x$ k: m* ]( _
;;
每一个turtle的全局声誉都存在此LIST
/ j, q! d% K% Q) ~, q' Tcredibility-list9 b" n5 U/ N# k* R* [, r& s0 M
;;
每一个turtle的评价可信度
2 q9 \$ ?9 w+ O/ t0 `& jhonest-service
7 w, X8 N5 n1 V  z% zunhonest-service0 |8 p* ~0 B: c$ S
oscillation- }4 E9 ~, |" T# @) C" X. K; S, I
rand-dynamic
' \/ Q6 g9 I$ @" }2 D]
$ a2 b) `& ~- K3 Z; G* a! h
" c  Q7 u* d5 s1 N) p: cturtles-own[
+ {! ]7 J( X1 k. D) v1 M- Itrade-record-all# Y6 Y: A2 Q. ]  b
;;a list of lists,
trade-record-one组成0 S) D% ]+ q: G2 C$ W. I
trade-record-one: c, s6 b* S( Q0 |: E
;;list,trade-record-all
中的一个list,作为暂存用,记录两个turtles的交易记录
8 m" E& Z) V) W3 V7 e* s7 a' t- P: k
;;[
对方turtle的编号,交易总次数,交易总金额,[本次交易的时间,交易金额,得到的评价,给出的评价,评价时间,此次交易后相对于对方turtle的局部声誉]]
( T) \3 a0 v6 @/ itrade-record-current;;list,trade-record-one中的这个list,作为暂存用,[本次交易的时间,交易金额,得到的评价,给出的评价,评价时间,此次交易后相对于对方turtle的局部声誉]
+ c6 Z& Q1 W- o% Ccredibility-receive ;;list,他每个turtle还需要有一个存储其他turtle对其评价质量进行评价的list" z5 q8 m- Q, C  b
neighbor-total: Q: p6 e+ p: m/ d6 B7 m; e
;;
记录该turtle的邻居节点的数目4 A' @" I7 m( K! }1 y
trade-time" [1 a8 O1 c: p9 [# }
;;
当前发生交易的turtle的交易时间+ u+ I, E7 A: E! v) f7 A( G
appraise-give/ g5 m- |% ^1 y8 D
;;
当前发生交易时给出的评价
6 n: W+ ~4 `7 a% M9 k. J& Mappraise-receive; z$ s+ t# l0 K+ B  |8 |& N7 C
;;
当前发生交易时收到的评价
$ a! d9 y) g+ U" W9 S' j+ Eappraise-time
& j0 R/ q3 ^" ^5 G* p* \;;
当前发生交易时的评价时间' e: K3 e0 ?8 l$ r
local-reputation-now;;此次交易后相对于对方turtle的局部声誉3 P) b7 O+ c1 v- t3 C/ e7 K1 u+ |
trade-times-total
6 c# g0 r( [" w8 V( F& f;;
与当前turtle的交易总次数
8 Q- z3 ]7 v3 O" G8 U' r& r; Ftrade-money-total+ G" D  _: b; o) L  r
;;
与当前turtle的交易总金额
: r( Q  s. k9 slocal-reputation  g+ S, F* J2 e; o  C
global-reputation% T2 R, ?* e6 E+ F2 q, \
credibility
7 {2 [# h- k# h2 t: \+ n4 W/ I, F;;
评价可信度,每次交易后都需要更新
# C/ v1 z' W4 K# f) \credibility-all* _& }, j0 i) O$ C6 {* T8 B( l- m
;;a list of lists,
credibility-one组成。[[1j的评价质量的评价][2j的评价质量的评价]……[ij的评价质量的评价]……],其中一共有people项,根据
; [+ S& p. h3 g+ G9 ]' \9 x0 U4 b  F5 T" [8 o
;;turtle
的编号对号入座,对于其自身的编号,在计算用到的时候再进行剔减,初始值均为0.5
6 D1 {+ N' Y) V& z- _; hcredibility-one
6 X" w& ^) H+ j4 a) Z5 L* I& @;;a list [i
j1的评价的质量评价,ij2的评价的质量评价……],其中一共有people
" L7 ^: F1 f4 }global-proportion  _; x+ F; y- W& `0 H/ X# v
customer2 |, R' u3 D' j4 Z, ~/ W  p' [# X
customer-no: Y+ x$ z9 L; T2 b2 x
trust-ok& ]/ Q: }7 \/ _' D9 t; b
trade-record-one-len;;trade-record-one的长度
  E, N- a) p5 \; _]3 p/ {/ b& G8 [- L' b

9 n* v. t3 l3 o+ P3 W" T! x;;setup procedure) ]! b- E& V1 r8 r( s

! q, g0 |/ ]+ k5 p8 eto setup6 I  ]! O+ H/ `1 T

7 ]# ]. Z$ m5 M- o$ b: Xca
8 `, S# K* L' A7 z  Y8 o

1 J: ]5 U# z3 h0 Yinitialize-settings
" N! N. S. N4 X# `8 L- N
1 X# g. t# J$ z  X4 \4 R. s
crt people [setup-turtles]
7 D+ g5 u, u. d; x) J6 r
9 @0 s! t1 U4 w% [9 h( h$ l
reset-timer

0 ?; ?9 w- i# ~$ l9 g8 d
+ a8 U4 {. V4 j% _( o$ Qpoll-class
; N- X  p0 L- d2 N) L
& Z& c# A0 J$ u; P, C
setup-plots
, V3 L4 |" H3 `. D$ ?
. I( I5 H; r% _! b9 o$ X; W: t+ i
do-plots

5 P7 t$ R7 B2 {  Lend
& ~# \! n. }$ `% V7 e( s1 V) h. z. G% Z0 Q
to initialize-settings
2 m: @7 }0 |+ Z; ~6 m! C+ _
9 F: l/ i) u) V* ^; L1 Wset global-reputation-list []
: L$ c% i7 f0 P( b

5 B0 L% b8 ]% c, j5 q+ Uset credibility-list n-values people [0.5]

7 M) p" h0 U  `( U$ y( s6 ?& b0 l; T4 M% Y/ Y
set honest-service 0
( H0 E1 u; ]; q
# y" ~; I( X3 q
set unhonest-service 0

, P; t: V4 e/ r; N1 Z6 _4 s: `! o9 M/ h# Z# ^
set oscillation 0

/ t. I  P7 y+ U* s
9 I( c! u- J. \; S3 @1 Bset rand-dynamic 0

" t  K# K$ G  b1 P9 D) }8 u1 bend- B; {6 l' h# b, D7 K$ A( T$ `) B

' E# Z, z5 Z2 R  u/ {2 Mto setup-turtles
0 K; q, K3 s7 w- j' q" w" uset shape "person"8 V( S' ^8 L7 c& T8 G
setxy random-xcor random-ycor2 H5 C' q5 p1 v2 |; P( I
set trade-record-one []
9 i3 q0 ]' ~3 ^. M$ C6 {! X

/ o1 J. p/ M+ q# ?+ o7 K5 @, Iset trade-record-all n-values people [(list (? + 1) 0 0)]
2 a1 i5 x( h% j4 P+ b& V, i
. P; z& W( W4 |# B7 M- D  }5 ~0 _
set trade-record-current []; \, A5 U' B7 r; Y
set credibility-receive []# {% m8 U/ [% k1 ~$ c5 u  Q
set local-reputation 0.5% d; g2 j: B; f" z& d
set neighbor-total 0
/ @& R, b; b. _  U' s8 tset trade-times-total 0& X. t% H$ C/ q3 ?7 @
set trade-money-total 0) d5 o2 M7 ]5 r/ X5 `1 r1 |
set customer nobody
# q* {& {1 @0 s- Mset credibility-all n-values people [creat-credibility]+ g( E7 t0 h4 r; C
set credibility n-values people [-1]
1 a9 f& ~2 L, U+ D8 i+ G6 Pget-color. N0 M& g* ]3 h) R  Z# |2 W

6 x- S+ X) F8 [( Nend; S, ~2 V! w  R2 c9 N& s# o% u) E
% {& ^" j) @, G4 ?5 E/ D" \7 w5 p( e4 i! F
to-report creat-credibility
1 z  q3 A& |9 R* f3 ?report n-values people [0.5]+ f! [% b: Q7 o. }1 a! T  g
end& w0 J5 I$ b( t! i* w! {

! r. M. @& Y1 n; j7 Xto setup-plots
) k' U- C  n- Z" }
" m- T) ~/ Y; i0 nset xmax 30

- [1 D4 ~9 E! a* C3 E+ i! `5 z1 X1 ?, m" e. d, H, A1 J
set ymax 1.0

; {& `- f" r  z* l
4 }2 a7 z0 @5 yclear-all-plots

- o3 F- h8 U/ b9 W1 v2 F7 F: D0 p2 L. y4 a* r1 \0 y  N! e
setup-plot1
8 \/ w7 g1 q  S3 Z

3 g1 \6 r# I2 |) c2 Esetup-plot2
7 O" U. C# p- G- _( J6 Z" `

9 V; U: O- g4 h# A7 I9 g  J, [3 Ssetup-plot3
. J9 C+ R4 r* o% _% M: v: o
end
; M9 a" R# ?7 q; T* O" Y/ S+ K0 h! u4 x) i) ?! p! C
;;run time procedures
  q( `. D3 d* h( t! i' S* U- i
4 B; H/ M8 L" k0 {to go, N7 D5 S5 l5 e8 o2 G: ?* l. o

' I$ I3 |( e, g$ G9 j$ d' yask turtles [do-business]
2 G) V" B: H+ {, N; h
end- o& ~7 q$ \; B% v& t

4 n: v* Q# B  b$ `4 Eto do-business
& T" O' q$ P; L7 O# h) y0 R1 h
3 _1 J  L; [' F$ d! k6 g

0 Z5 M5 a- z4 a4 v- ^rt random 360
& s* U1 g, J; |7 \& v
9 h" \! N" B# N
fd 1

! c3 W0 d# g! k0 a6 j& `6 U( \9 p5 d) U' d7 f
ifelse(other turtles-here != nobody)[
/ x* g! b8 J" ]# h$ W" ?) Q3 B

: K+ \$ K7 W+ i* h  K7 r; _- \set customer one-of other turtles-here

4 r6 a* D/ k6 u! {/ d/ j8 J. s3 ~* \1 e% m; x
;; set [customer] of customer myself
% t0 X  I0 _8 ]5 ^* L
! v6 z9 }$ W- L! X
set [trade-record-one] of self item (([who] of customer) - 1)) P; v$ E* ^- `, Z- N
[trade-record-all]of self
6 Q0 I1 |/ y, q7 L5 o+ ]3 p;;filter [item 0 (? ) = [who] of customer] [trade-record-all] of self
) t( Y; Q! Y0 ^

+ A  T$ Z% V# F" m( Tset [trade-record-one] of customer item (([who] of self) - 1)
! Q1 R" f! @; _4 J[trade-record-all]of customer
+ d* r: `! H% b% [9 E' l

, j/ a5 t5 t3 _) G( T) vset [trade-record-one-len] of self length [trade-record-one] of self
# j* ~& {4 }, U/ G, `& h

9 }" e% h. K  `1 w! S% Q- p, Aset trade-record-current( list (timer) (random money-upper-limit))
: u" {% q+ {& n( n$ E
' T0 D9 U( o  U. I. S8 O
ask self [do-trust]
1 ^+ s7 q# |) i9 F7 g;;
先求ij的信任度) ^3 I, R9 `' y+ z4 q8 q. o5 i
5 g. Z% c# g( _7 W
if ([trust-ok] of self)
1 p, |8 i  D( V9 P;;
根据ij的信任度来决定是否与j进行交易[
# a. @. x- n, D( ]/ pask customer [do-trust] if ([trust-ok] of customer);;
这里可能会用到myself- @3 E7 I1 Q  E' G" Y3 e, z
3 \6 w: w+ j& H) _7 e
[
1 g  ~# B2 H0 h
- h3 O  K/ w( T
do-trade
- n8 {! E! J( Q; |& I& {
; r6 c! O" ^% D4 ~6 m! x
update-credibility-ijl
5 o- E- e# }7 T  f
7 a3 o' M4 z4 _
update-credibility-list, @, I1 A' t/ n8 p; R; r
7 \4 B0 a- m, O& E, Z

+ P4 j9 P. K7 l' Z- h3 S; Cupdate-global-reputation-list

' ?9 C3 D1 F+ h; _& r% t7 C; Z! _* d) g; T0 U! d0 R; D
poll-class

4 {! \6 d& q9 C7 {
; |' B: t* [6 ?1 P3 W) zget-color
) x9 x2 E3 C8 Z0 F" K' P2 q. M
  h- k0 N7 p  I& w
]]* b+ C% w- k5 N- |, K0 R0 W
+ s7 D1 x3 F. n8 j/ K2 w
;;
如果所得的信任度满足条件,则进行交易" k6 u4 C- C, e6 S

5 A% V6 C# S; @- h3 c. |: Q$ o& i# q[

) s# C, X; b! I. o: Z" }
9 b8 ?* F# o5 B' Trt random 360
6 S: I" o* d( @3 e. D7 W
# }9 h* J! y8 x& G* G( p& Q
fd 1
$ l/ I$ i' A0 U  I, e1 x0 w
2 E; c5 w/ H! ]! u0 [
]
8 W  E$ B7 b; ^; K
7 i' c# T2 r. X4 Z0 k
end
) Z$ ^4 y( @6 Z1 v
) h, H2 |2 \- U5 P- `; @4 ~
to do-trust 4 B/ d+ v& e- D: P7 ]9 s9 U! O5 X" R
set trust-ok False
# U9 i& K) B& P! u4 s0 N, n
# i0 L" d9 ?1 I) C5 C' g
; _0 k# A4 m" N0 V( M. |% F
let max-trade-times 0- ]0 Z( o3 Z& s+ ~  w7 K
foreach [trade-record-all] of customer [if item 1 (?) > max-trade-times [set max-trade-times item 1 (?)]]6 N# M7 y, a. v- y/ `! j* m% Y
let max-trade-money 0
2 x1 V% g4 r4 Kforeach [trade-record-all] of customer [if item 2 (?) > max-trade-times [set max-trade-times item 2 (?)]]
+ H" {: ]3 ^+ q5 N; T/ }" Vlet local-proportion sqrt((item 1 [trade-record-one] of myself * item 2 [trade-record-one] of myself) /( max-trade-times * max-trade-money))
! M' i$ Y$ K; g$ Q- j/ K3 k% U6 Q) ]5 \1 Q* m5 h' T1 c8 |

( J6 u& H& o9 Y3 m6 A  Z3 {% rget-global-proportion
8 S& ^+ ~4 i; Jlet trust-value5 V2 x+ T& p$ u
local-proportion * (item 5 (last (item ([who] of customer - 1) [trade-record-all] of customer))) + global-proportion *(item ([who] of customer - 1) global-reputation-list)
6 X3 I$ E' I. A
if(trust-value > trade-trust-value)9 L& ~2 o  Z5 x2 W- l
[set trust-ok true]6 Q. ?1 d8 W; N1 T  B
end
: ]* m0 {5 r& v4 E, h' |- d! U6 y4 B. Y; T- ~+ ?5 d
to get-global-proportion
5 s; f1 N/ y+ j% {# hifelse([neighbor-total]of customer = 1) and (trade-record-one-len > 3)
! N$ n1 R/ i7 [) p( N& ]8 j[set global-proportion 0]
( }1 a; a& Z& l* w; f' w  w% D; P[let i 03 `# _/ _- q, @! E6 Q0 x; ]- @8 q
let sum-money 0/ M& V- c0 x4 Z; h
while[ i < people]5 ?+ Y  f; h7 i% M& m
[
) m7 N' Z/ b9 w+ a3 a* e/ Gif( length (item i
1 @" m0 ~& }' {5 O4 q1 @[trade-record-all] of customer) > 3 )
4 Q$ x2 F1 s9 i' h" |+ N: v
[
4 _6 s3 Z2 r5 n1 R) Iset sum-money (sum-money + item 2(item i [trade-record-all] of myself))( t7 h( G. [* O% c' a' y
]1 ]- k( x* E4 L& g0 s
]% }  L& E0 s3 {8 o0 V
let j 0% |: E2 _6 }2 Y( v9 j! x+ g7 z0 p
let note 0
8 f- {" W% B; D. ?' b7 N1 Owhile[ j < people]0 q/ h# r1 P& ~1 W9 P5 ~% C
[
; t% @( O+ V+ d7 l- x. xif( length (item i
1 k+ `7 e% e, v, x8 L' K  L[trade-record-all] of customer) > 3 )
# c- R/ {0 Z$ Z$ x$ g. @4 x
[0 P1 b: x, m! S/ ]
ifelse(item ([who]of myself - 1) [credibility] of turtle j != -1)
+ _, j8 u' B& q6 }! E& a& P[set note (note + (item ([who]of myself - 1) [credibility] of turtle j )* item 2(item i [trade-record-all] of myself)/ sum-money)]
! }( E; q* `' I4 H[set note (note + (item (j - 1) credibility-list) * item 2(item i [trade-record-all] of myself)/ sum-money)]- f# d& b0 a4 ~* `- X2 e7 a: r
]
# M- j- x7 _  m" ^$ ~' h1 x]# P2 Q& I& Z6 N, N( p2 i% d2 `3 Y8 {
set global-proportion note
) Q4 V- n1 V/ F+ T/ j]
" u, z# ~+ ]' y  c2 Dend7 Z) q0 [  L  M5 ?# {& \% f& ~
' r+ c# @1 `' u* L9 w+ K: m! E0 c
to do-trade
# t7 s' a* O. S;;
这个过程实际上是给双方作出评价的过程9 v2 r% g7 w. _0 _
set trade-record-current lput( random-float 1) trade-record-current ;;turtle 得到的评价. S! d' `9 b, c7 M; S# H6 A
set trade-record-current lput( random-float 1) trade-record-current ;;turtle 给出的评价
4 i5 v7 \/ `5 wset trade-record-current lput(timer) trade-record-current
- s' I% P/ A3 {7 W5 n% M) E! r;;
评价时间
/ V$ O% o0 o; f4 q8 \4 ~% ?ask myself [
. p0 t0 u- D1 _$ Y, Jupdate-local-reputation8 @2 n) N2 v% f& @) ~* d
set trade-record-current lput([local-reputation] of myself) trade-record-current) ^5 q- Q7 Y+ [# r+ S
]
# K* T+ k' n2 l# S7 z) M0 _! lset [trade-record-one] of myself lput(trade-record-current) [trade-record-one] of myself
/ a! s' b, X1 [2 \  H+ L;;
将此次交易的记录加入到trade-record-one) C8 _7 H. W3 b5 i+ o
set [trade-record-all] of myself (replace-item ([who] of customer - 1 ) [trade-record-all] of myself [trade-record-one]of myself)+ ^" t" }' S3 j
let note (item 2 trade-record-current )$ B8 z9 h8 y' A$ a- p
set trade-record-current$ T+ ?6 a* W1 P) I! A& E5 p/ v
(replace-item 2 trade-record-current (item 3 trade-record-current))

9 M: u1 `) R% A( K' ?7 jset trade-record-current4 r8 e+ R# T8 I" @! l* r! {; E+ k8 x% I
(replace-item 3 trade-record-current note)
7 x; H% {& g' i  e/ W
$ u" N3 V) [$ Z$ M+ y! }

. e/ _1 H/ Y9 Qask customer [+ A" E/ B) M! U/ i# c8 }4 w7 {
update-local-reputation/ A5 u6 e$ C  Z" m( t
set trade-record-current
" B% u2 k7 A8 j/ b6 }0 l(replace-item 4 trade-record-current ([[local-reputation] of myself]of customer))
4 ?/ K4 S- _+ J" O  I/ H
]* G4 M, X  O: O) Y
, p* x& M9 S! Q& s+ u
# F( w0 A( }" _  R& q$ a
set [trade-record-one] of customer lput(trade-record-current) [trade-record-one] of customer
0 G$ n  o4 a% a% i" e1 j
4 f% S" n6 D0 U# E5 Z  c
set [trade-record-all] of customer (replace-item ([who] of myself - 1) ([trade-record-all] of customer)([trade-record-one] of customer))
) K+ L# T" _: O. f  b;;
将此次交易的记录加入到customertrade-record-all* X; o6 N) Q! Y5 w3 Q, G
end, h7 F4 v: [3 B: y# ^
. d& q1 ~, V+ U: g
to update-local-reputation
& F2 M/ W/ F/ K/ Dset [trade-record-one-len] of myself length [trade-record-one] of myself" a5 w: C2 R' I  Z# Q% h1 c/ X

( T# u6 v% p- r7 \: ~: |) }& f
8 Y4 F" F. p3 P0 n  P! k6 z. h% Z;;if [trade-record-one-len] of myself > 3
0 ?8 @8 k5 G9 o3 p( @
update-neighbor-total
8 D% D6 ]/ }/ w% J. j+ [8 U2 ?: s;;
更新邻居节点的数目,在此进行# U3 r& d, ~9 |2 ]( d
let i 3
8 s9 j3 B7 ?7 plet sum-time 0
! q2 [1 v- _7 U+ g7 z+ G' I! [: @while[i < [trade-record-one-len] of myself]
5 A2 G* k* M8 p[
" `8 n! u+ [  ]set sum-time ( sum-time + item 0(item i [trade-record-one] of myself) )+ C& Y% `4 p' g) ~  ]. R8 P2 ]( K
set i  Z0 G9 ^4 g; r& I# n3 K
( i + 1)

  `) ^! e( L9 Y' d4 M; d% A]
# J0 F% T! x7 s- U6 w/ u4 L# vlet j 3
( [/ ^$ A0 X( S) _let sum-money 06 m( U8 o& D3 e' {: ]9 ?) O
while[j < [trade-record-one-len] of myself]
1 X2 O2 K/ k; T+ |[
8 E! M, [( }% r; R1 _  ~* X$ Cset sum-money ( sum-money + (item 1(item j [trade-record-one] of myself)) * (item 0(item j [trade-record-one] of myself) ) / sum-time)" d9 k0 O( C+ i$ A
set j# ]* C6 t2 h, \/ G  w
( j + 1)

$ L' V& k$ D' c7 t]) X$ I- t' e" L% E( G6 \
let k 3
, p6 m8 ^$ m! T& J5 p. P1 f4 J2 vlet power 0
4 e) ?8 |+ H6 Elet local 0- p! T5 c6 k. ~% n
while [k <[trade-record-one-len] of myself]
6 O8 O, u: ?+ C7 d% f[
* k$ a* _. y3 C: y2 p( {5 r/ ?; Y5 Lset local (local + (item 0 (item k [trade-record-one] of myself)) * (item 1 (item k [trade-record-one] of myself)) * (item 2 (item k [trade-record-one] of myself)) / sum-time / sum-money)
* C; N* G) m" V2 rset k (k + 1)0 W7 g; J5 @3 p1 G# y0 ~$ q
]
+ c/ H4 q; r  e9 Aset [local-reputation] of myself (local)
. m- `" i/ h# M0 \end
, g+ E! F' e' Q+ L: C6 m8 P) e* F$ b' J
to update-neighbor-total
, r6 q  C9 G$ B) ~' E
. E4 t) c. z6 nif([trade-record-one-len] of myself = 3) [set neighbor-total (neighbor-total + 1) ]
4 n0 `5 |! C+ _6 `, S
# P/ H; h/ t( j. S

4 I4 I/ V& O7 r2 O" N: @end
. P$ K7 O3 `; U' @! A
" i0 t6 H) u5 J& h3 mto update-credibility-ijl ! x0 c" u( p. J- G- o! Q! c
1 u0 F) Z* }$ Q/ ]4 q/ n
;;
思路:每一次,当一个turtle发和另一个turtle成功发生交易作出了评价之后,就去搜索本次交易对象的邻居节点,对这些邻居节点的评价质量作出评价。: t& i, Q9 P, Z, [% g* H% m
let l 0
2 G0 f. c5 H. u- P$ ?while[ l < people ]; Z9 M2 N: R# N2 l& v
;;
j的邻居节点的trade-record进行扫描,以对j的邻居节点的评价质量进行评价
- U4 [! d- Y- }' V! c[
7 }3 S( ~: x0 K) M5 n* }& Klet trade-record-one-j-l-len length item l ([trade-record-all] of customer)
) b5 `( U( k3 W; _: b- _if (trade-record-one-j-l-len > 3)7 k0 _+ A, ]8 A& b5 H7 m
[let trade-record-one-j-l item l ([trade-record-all] of customer);;暂存那个评价质量正在被评价的turtle j的与ltrade-record-one! _/ Z: R- \4 C7 q5 d3 F, W
let i 3
* K8 X# K4 A* a, hlet sum-time 0
4 F: F3 I; g' }3 ?6 Uwhile[i < trade-record-one-len]. y( P4 I9 z& P
[) q% O" ~: R$ y3 ?
set sum-time ( sum-time + item 4(item i [trade-record-one] of myself) )
& D6 R0 I7 u! G0 e" f9 ~3 @set i
) S( p* @( `( u6 }6 n( i + 1)
: G: a; e1 Q: o: m, e
], _9 U9 j: p. L, e; V
let credibility-i-j-l 0) D( A6 |/ U/ I& J9 L# q
;;i
评价(jjl的评价)
3 U! {7 Q9 x; W7 s, wlet j 3( T  w2 U$ l' p
let k 47 n) Y& ^/ W- T$ ^
while[j < trade-record-one-len]
' ^& X4 h* k+ K1 i9 a  B8 h8 t+ u  ]: E[9 ]" Y% H, K. e5 J; ^# p  l$ W
while [((item 4(item j [trade-record-one] of myself)) - item 4(item k trade-record-one-j-l)) > 0][set k (k + 1)];;首先要寻找在ik次给l评价的这一时刻,l相对于j的局部声誉# ^$ E. t. V" ^* r2 q  V- o
set credibility-i-j-l ( credibility-i-j-l + (item 4(item j [trade-record-one] of myself)) * (1 - abs ((item 3(item j [trade-record-one] of myself)) - item 5 (item k trade-record-one-j-l) ) )/ sum-time)* C- ]; P. r' C9 T& ~
set j4 o* h, G. F  [1 t+ F. w
( j + 1)

1 R# T: v2 K  {9 g3 |1 M]
. @8 B& G) X+ o/ ?& H( P/ W5 Z4 Iset [credibility-all] of turtle l (replace-item ([who] of myself - 1)([credibility-all] of turtle l)(replace-item ([who] of customer - 1) (item ([who] of myself - 1) [credibility-all] of turtle l) credibility-i-j-l ))* Y  [4 Y7 @; O7 T" t6 Y6 K' P. W
' J" j- ^; p7 ^/ D3 @3 U
; \3 F+ I! m( T1 @) @
let note ((sum (item ([who] of myself - 1)([credibility-all] of turtle l)) - 1 ) / (people - 2))0 P8 s1 U+ J0 {$ A8 d* I) [2 R
;;
及时更新il的评价质量的评价
  K- ?! ^1 D; [- J# u. J* Y0 P# Pset [credibility] of turtle l (replace-item ([who] of myself - 1)[credibility] of turtle l note) ]1 y# `) v  ^! G' M# q: y) }4 Y( P
set l (l + 1)" L- m2 E5 R8 q9 P
], s( b% }/ Y$ J& ]+ k0 `) y
end
! R' t" _' J7 y4 F8 y) ~9 I" o/ u7 D7 |' N# U( R) J
to update-credibility-list  W/ y1 \& ]& X$ v4 ~
let i 0
8 x: e& `2 g6 x# W. Twhile[i < people]
0 ?- ^" ^' x" P' |: B& S7 Q% P[
" w- @8 Y$ m% g( |5 v" K: W$ Clet j 0
3 R- z* \( j% f3 j7 }let note 0
! Y3 G- A$ b9 b3 O" ~let k 0( |! r5 l7 B" k
;;
计作出过评价的邻居节点的数目4 A' C: R+ Y0 _7 H8 b: E8 ?
while[j < people]8 Z6 x* ]8 F" L& y1 E( L+ A: m
[4 C4 P9 Q4 a! X1 l5 E, a4 b
if (item j( [credibility] of turtle (i + 1)) != -1)+ w+ o9 r) d, M9 x# U
;;
判断是否给本turtle的评价质量做出过评价的节点9 A% R8 D. N' n0 k: Z
[set note (note + item j ([credibility]of turtle (i + 1))). S4 d& {0 Y( k0 g* K: ]
;;*(exp (-(people - 2)))/(people - 2))]
5 y( v$ e% F2 _$ U0 J
set k (k + 1)
7 X4 r0 Q8 [5 q$ ^]
  D, c4 v2 o/ P+ a, ?6 q  l5 Sset j (j + 1)
% ^5 S8 y0 C' `4 i2 j]- V+ Q. o4 m, j: P% K3 N$ m# Y
set note (note *(exp (- (1 / k)))/ k)& j6 l) ]# _6 L/ g0 L1 j$ j3 Q
set credibility-list (replace-item i credibility-list note)# A' h. R$ Y4 y( B8 p' C' f
set i (i + 1)
8 x% _2 w( s9 u3 G( L3 J4 p6 _4 o]% d" R& o! E. }* E  q; Z: h% A
end
. x( i# y; X4 u
! `* Z2 u3 `5 ?4 y+ dto update-global-reputation-list6 H1 P2 K7 R( g; d
let j 0
0 d4 A  K+ Y8 y) {while[j < people]
- c+ U7 K: F5 D' p[% o( i* e4 J' F& }3 @0 Z4 U# j
let new 0' \6 ]. W* f% J) V1 L. d
;;
暂存新的一个全局声誉3 @% Q/ p) ^' E9 h
let i 0
; n2 {  {* Q$ p7 jlet sum-money 02 C& i' W" W& w, V% T7 A
let credibility-money 0- Q8 @$ Q4 p! F- [+ E% J1 x& X. ~5 h
while [i < people]8 t" v# b. K4 m5 n
[! A( {) t, q' m9 p
set sum-money (sum-money + item 2(item i [trade-record-all] of turtle (j + 1)))
2 d) G( t5 t$ q4 L( `3 rset credibility-money (credibility-money + (item 2(item i[trade-record-all] of turtle (j + 1))) * (item j credibility-list))0 X0 S" T) t8 W2 d  }
set i (i + 1)7 h' U2 j: d1 z( X+ P
]
% H& g" }# X  Elet k 0
- B8 U! ?# `, v' ?let new1 0
) y4 j2 U3 S3 |: w- d4 @# Z8 kwhile [k < people]" A) B; _2 b* \
[8 ]3 z* s+ y+ G
set new1 (new1 + (item k credibility-list)* item 2(item k [trade-record-all] of turtle (j + 1))* (item 5 (last (item k [trade-record-all] of turtle(j + 1)))) / credibility-money)
( v) a& O5 k) N7 Aset k (k + 1)
. j1 H" r$ d% Q5 Z' }: i8 X8 a]
9 |3 y/ z" ]9 X$ d" uset new ((exp( -(1 /(sum-money * [neighbor-total] of turtle (j + 1))))) * new1) 3 A$ D! I2 l6 _  U
set global-reputation-list (replace-item j global-reputation-list new)
2 ?' g# F+ I$ v" I( x! Cset j (j + 1)
' X; W& W7 a6 q]
  g9 t- x: d" w; hend6 i! j$ G" e3 M
7 d4 f2 p, U" Z  p' W, ~& }
5 P2 K6 V! a, ]" ]  T: P3 \

; \7 d* s) M! Lto get-color) P8 E9 e) m  c# S; ]- p
. t  b  X6 l5 s( x
set color blue

, V$ _$ t. U$ v4 {: A3 {end1 n. s5 d. p. f, Q9 f
7 d  V! R3 N7 q" D) l
to poll-class; P2 b7 E1 N/ I; P8 ^. m! w; N
end1 _# ~: F. {  A+ T' p- c1 \
8 ?: y: E, h) f- A4 \9 z7 L0 o- `% b
to setup-plot1
- H+ R* H# A0 c) }
  _) C1 S! v, @( c$ ^* t; p3 [4 tset-current-plot "Trends-of-Local-reputation"

* F, {! x7 N) _) a: a0 j. a! \$ [- q/ X9 ]0 W
set-plot-x-range 0 xmax
% ~  x$ a6 v" T
0 @* s& z' @) q- X9 R9 W0 V
set-plot-y-range 0.0 ymax

2 \& ]6 U4 X6 ~3 e  V) Wend
- ^& @( k$ f  O0 ?; J
, N: p4 k3 Q  x5 |( r7 o& B! V, Jto setup-plot2
/ h  Q& f3 b: [  b
* s' C0 ?- {6 Zset-current-plot "Trends-of-global-reputation"
8 ~! j, T4 Y) y# _" l4 ]8 ^
7 a4 z$ |0 |% c5 n7 l1 t
set-plot-x-range 0 xmax
! Y1 }7 x# m, E2 z
+ d* t, P5 Q9 Y6 {' b
set-plot-y-range 0.0 ymax

4 x' M' _# G6 a: g- yend0 [& p" o- O$ e( F* `- B9 v1 [/ `* ^

( O0 l1 L5 Y2 Wto setup-plot3
4 R8 W" S+ p# n$ ~7 l3 V, ?/ B* v1 Y3 E7 F2 w) e1 g" a
set-current-plot "Trends-of-credibility"

; b4 z; y8 c6 Q, C: {  D6 Y' G
# j$ r' ^! h: I5 Z/ ~. l7 _1 n) vset-plot-x-range 0 xmax
$ u5 \' ~8 k2 z) A

7 Y) N* r5 p. H+ H* L: Rset-plot-y-range 0.0 ymax

* H9 C8 c' e4 ^+ mend  @- ]' W+ }6 U  n
6 @# R- |; W. N
to do-plots- i5 `! r/ J' ^; B* d
set-current-plot "Trends-of-Local-reputation"
& m' ]; F3 T; s% Z% Mset-current-plot-pen "Honest service"' V5 ~# i, n* j1 z, D% _2 \2 w
end
1 R) p; m+ g' L# d6 I( _
3 Z3 o1 \7 W: @# c[ 本帖最后由 Taliesin 于 2008-3-19 12:45 编辑 ]

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发表于 2008-3-19 11:33:07 | 显示全部楼层

有点困难

没想到挺复杂的,我去问问师兄们,不知道你是自己建构的模型还是其它模型的改进,我试了一下好像setup都有问题,别着急啊,呵呵 。
发表于 2008-3-19 11:34:29 | 显示全部楼层

还有啊

发表于 2008-3-19 11:35:59 | 显示全部楼层

还有啊

能不能传nlogo附件上来,一个一个敲太累了,好长的程序啊。
 楼主| 发表于 2008-3-19 12:47:57 | 显示全部楼层
嘻嘻,不好意思啊,现在把附件加上了.
8 l  h" ?; V+ o6 c) O2 P# K& Q" a% A2 D/ N: M4 O3 W$ j
这是我自己编的,估计有不少错误,对netlogo了解不是很深,请多指教,谢谢!
发表于 2008-3-22 16:55:16 | 显示全部楼层

程序公式

我问了一下,只是从程序角度来分析,是跑不起来的。如果参照你建的模型(公式),可能会有帮助,我的邮箱是wjcpcahu@126.com.方便的话,看看能不能进一步探讨。
发表于 2008-5-19 18:02:44 | 显示全部楼层

运行不了

提示custom无值,这是怎么回事?
发表于 2011-4-10 14:42:01 | 显示全部楼层
好高深
发表于 2011-11-7 11:36:13 | 显示全部楼层
为什么大部分的帖子的交流都止步于2008年,从08年到现在好像已经很长时间没有更新过了啊,为什么呢?
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