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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:& r+ s: O# n5 s! u* d  C
to do-business 2 W5 J7 u% s5 L* i+ I
rt random 360
* M4 T/ K" p& I0 X* b: D1 c3 Q fd 15 m  M% g3 N& ?8 m$ U% i. Q" B
ifelse(other turtles-here != nobody)[+ C  l9 ~9 E  d! l8 |
   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.9 R2 I, D$ H' D: K" k
   set [trade-record-one] of self item (([who] of customer) - 1)  [trade-record-all]of self    , {. p$ O  S% O3 a6 t7 i) C6 X& T; X
   set [trade-record-one] of customer item (([who] of self) - 1)  [trade-record-all]of customer. O) b" l( m' ^  P, m9 _
   set [trade-record-one-len] of self length [trade-record-one] of self
  g6 n/ J" Z/ `0 e   set trade-record-current( list (timer) (random money-upper-limit))
9 `# d% n" _: G) l: d
2 l# x4 G0 r. [3 d问题的提示如下:- g" S# {5 L5 h- B

2 s9 O$ G5 N7 F9 }3 Kerror while turtle 50 running OF in procedure DO-BUSINESS
# E' J3 r$ ~& o, \7 {% R0 G' ~) {  called by procedure GO
) Y5 f& d0 B4 N  _$ ~. R2 D/ AOF expected input to be a turtle agentset or turtle but got NOBODY instead.
7 f) `9 Y6 l1 \* r( r6 l4 Y
(halted running of go)6 L% o- T% E6 J' o# |/ o

1 ~. n* E3 s3 ~6 g# r9 |. S4 |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~~6 t* l4 U* x$ W5 h) {0 G- G
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7 C5 [7 V0 h* T( m  O7 K
globals[" |+ f& u; G, l0 s. ~5 J
xmax$ }! V  P: u6 m- R: I. l- t
ymax4 n  ?6 R& k; f7 z6 Q+ A
global-reputation-list/ m: d: y- L& {+ I% ~. C, H
& i: o* m1 r5 F  G6 W
;;
每一个turtle的全局声誉都存在此LIST
4 q' S0 Y& |5 B( Q! Pcredibility-list5 u% _" t. P7 t3 f+ a
;;
每一个turtle的评价可信度# [- z0 C- q" t# O  m
honest-service8 q+ E' u8 _' \7 m2 f! c) M. b; s
unhonest-service
/ r" ?# E$ o' S1 j, A! voscillation
" h0 Y$ i$ |# j8 Yrand-dynamic
1 }: a& ]2 Q' f; G]
7 N  ^% V. F- c1 |
; ]% f" i  ^! l( rturtles-own[) ^- i) Y1 O/ U' d
trade-record-all% o6 b+ b7 x8 ], X) j
;;a list of lists,
trade-record-one组成& {. _3 q3 Y. T  p* _; u5 `3 F- V
trade-record-one" R% C# U9 J2 d& t
;;list,trade-record-all
中的一个list,作为暂存用,记录两个turtles的交易记录2 a. Y2 ^; N0 V5 g6 w

0 q  G8 ^1 F# O, B# A3 R;;[
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]]
7 I$ R  b, U9 |# Etrade-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]" o+ |( t2 _8 Y
credibility-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
7 x  `8 Z' u/ H$ mneighbor-total
/ O0 x, f6 p' d2 Z( G# |;;
记录该turtle的邻居节点的数目& H- f0 ?+ c4 I# k" g% x  C
trade-time7 F! V8 M0 S9 f; b* H
;;
当前发生交易的turtle的交易时间' J. K" G+ W$ J" a0 j( c( {+ S
appraise-give3 `2 X* \1 ]; T/ G/ c9 T
;;
当前发生交易时给出的评价
7 @- g. F. m7 f8 H% Y# cappraise-receive
' R& Y6 t- X! Z, p;;
当前发生交易时收到的评价/ W& U) _0 T+ W- \: v
appraise-time
! [6 f" H9 Z1 D9 \. {" b;;
当前发生交易时的评价时间2 k9 m  I$ z( k/ v
local-reputation-now;;此次交易后相对于对方turtle的局部声誉0 @* p! T$ T6 D! M2 a
trade-times-total
( b( y+ |- ?& p2 ^' q* M;;
与当前turtle的交易总次数5 N! b+ L' _4 R% r6 e
trade-money-total8 `5 C# u4 \' ?6 e  S
;;
与当前turtle的交易总金额% `$ B" n' e5 v, C4 \
local-reputation# j- ?' O1 p8 Y
global-reputation* x7 L( S8 g' I9 c8 @* i. P
credibility
$ B4 m4 g3 ~, ?0 T5 G: s+ Y;;
评价可信度,每次交易后都需要更新, r6 l- d. b: a: n
credibility-all; Y/ E- Y! r  k9 c7 F- O2 ?; @
;;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) y; ^0 e6 |$ n3 }! Q7 I. o

; V$ h% ~* w4 g' ~;;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0.55 j/ t9 I+ j, I- @, G' |
credibility-one( |0 `* w% p- U2 W0 \
;;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; \. b3 W- S' a$ I5 ^/ u
global-proportion  W7 V4 h  f8 n5 C9 Z* g  ]; ?$ I: P
customer# l: w" B/ {/ R3 d' Z, Z
customer-no
0 i6 L; K! a& \. itrust-ok# ]' w* {+ \3 D6 A* f
trade-record-one-len;;trade-record-one的长度
3 e' U) W6 D2 {9 \8 d% P. g]
+ R% S3 h/ X! [# K2 w1 X* z# ?% t! L' f
;;setup procedure
; o0 B! H4 a' `
' l9 C5 b4 e; I% R5 v* h2 jto setup  k# K5 I8 C' d. x: l

9 K, W* X- G2 o% _* C0 i+ M/ V  S4 cca

3 y* d( r) g) ~5 q+ j& H, i  _' h! A7 W5 J
initialize-settings

$ Z/ e. B$ T3 ?$ l" j# B
6 I# M/ U- n( s  v3 n0 O4 mcrt people [setup-turtles]

# \/ G$ z. g" c) ^* W0 @. F+ ^, ?6 ?: Q; Q* \. ~7 H' O8 ?
reset-timer

8 p4 L3 p/ v- w6 i$ |  |
7 s3 i! H: `# S% E* n7 q* ]2 ?poll-class

1 g  _/ ~) A: v' t7 Y+ J% E& n: E) W9 v3 W6 F$ ~  W/ P; x  h5 ~
setup-plots

# ?9 T  y4 ?( ?8 x& g4 v/ A- v  S6 S0 d( N5 U
do-plots

& m' ?; _! Y1 w/ Qend
1 P7 e) @& c+ L2 K9 \2 X& ?( B7 F0 y6 i) _$ h
to initialize-settings. I) y7 o  i( L

8 x2 t) o  o. p: `# O- X5 ^4 i7 `set global-reputation-list []
' e5 s3 K. ?; {) @0 m' X$ {5 l

6 v! _/ e9 V# g2 P) N6 b  pset credibility-list n-values people [0.5]

! {# h$ o- J' q. ]% a* {' D7 i6 x" ^7 O+ }! U5 F# [
set honest-service 0

) ]" r8 W1 f) D9 F3 X& [1 ?* S( v5 f
set unhonest-service 0

; P- u2 E& ~* {) H- f# T
/ z! E9 H" s$ fset oscillation 0

& U) E$ }. _7 }5 e- v6 j/ ?8 M9 x7 D5 }6 z
set rand-dynamic 0

+ {8 C7 J/ a3 P+ z/ e! `2 ]end
1 ~5 g- N- e! E- D( V
# e6 b; |) n% G# w  M  Q& w8 ato setup-turtles
/ t& r. H" y5 p/ c$ C8 Jset shape "person"
) `) P! e) Q* R8 P* Dsetxy random-xcor random-ycor' ]7 r1 D- ]2 \4 c- ]/ n' C9 C- y- |
set trade-record-one []5 Z9 a2 ?" V7 C2 a* H
* l% Z! ~) A$ \/ B  R7 g& x' f# `
set trade-record-all n-values people [(list (? + 1) 0 0)] 3 H4 A" }! ]7 N$ |  p. Q
$ H5 E) D9 y. }
set trade-record-current []
3 Z& F2 d# V  |& vset credibility-receive []
; _" |1 @' ]1 f! C9 P+ I' Hset local-reputation 0.5; Z* ]& F6 I" d* u( U  l
set neighbor-total 06 d! s9 }- `5 R8 G
set trade-times-total 0
, o# ~/ b6 k# W. bset trade-money-total 0
6 x7 c: P2 M! h3 k& _set customer nobody; s3 I6 @( y2 h+ V) k
set credibility-all n-values people [creat-credibility]3 _7 c  l6 G; C
set credibility n-values people [-1]8 \  q( J' R* i& Z
get-color  H) w7 D. M9 U( A

2 l* d, g3 w% ]' K6 [end
& S, o3 D# d/ V; [; r  N$ ]
& P4 n$ U+ F1 p, R$ O9 X5 Y' Fto-report creat-credibility/ F) ?# i$ R. F( {
report n-values people [0.5]
, ^  w( w  {* J1 `* c3 u% v  vend- X+ h4 E. @, z3 G" D

- H( B  B  d/ y1 c. F# B( p2 ]" J5 ^to setup-plots! |# j9 O7 r/ R" X

  q0 t1 Y# S$ X  |8 q  Y# oset xmax 30
- A% W+ `+ D4 U4 r/ z- G/ D

- p& j0 e6 k$ z7 Y. ?  g# |set ymax 1.0
. ^( i8 Y% K8 }. g; p
9 `" d3 }7 u  K4 z
clear-all-plots

3 M9 j. l9 m8 s5 z- e
" n* y% H/ D6 [3 V/ [+ Asetup-plot1

/ R2 g9 C( g+ J2 Z: ?" ]/ \/ ?
4 @" l: e  H0 f* osetup-plot2

' l( |7 Y( Y0 j* P2 r5 h' [  O
% R8 D$ w* n. m& {8 _; asetup-plot3

6 s( w. x( T, Y" w3 e+ O( ?4 i8 [end2 O3 Q, m3 q2 F% v4 @1 S

* @* b  z% Z3 i0 P* x( {;;run time procedures9 Z, B" X+ u6 w) T# L- X
* @: X# {+ N5 P' c) b6 Z7 ~5 w0 n
to go
; ]6 n& v% F/ b9 C
4 g5 }9 M5 a, k7 n/ q; I# \( [ask turtles [do-business]
1 [( {& r: o8 W
end
! O' K& t8 B- Z) e4 Y
. E( ^" B* e# m. V! ^, {# @4 O" y- Yto do-business
! `) X% \8 a( l/ Z# F- ?% R! U" C2 M4 j
) C4 N. u' V! S6 M8 @! W$ i3 r
3 \1 G7 v0 M3 N0 ]. ~5 i
rt random 360
9 V: T2 _: l' T; S

' q$ \( U- z# ufd 1

! s6 H5 m3 I9 Y+ T- p- x. V, f0 P# z; ~& b7 T/ `
ifelse(other turtles-here != nobody)[

7 ^1 I$ p' h# I8 u5 M2 a* j4 [( L+ V0 Z; m' K
set customer one-of other turtles-here
6 w, u4 l) y6 E7 b/ R
9 o& I- \3 L7 U7 W& u
;; set [customer] of customer myself
( a- D5 x6 O. c( D; g+ c
. G# v0 C! v) ^
set [trade-record-one] of self item (([who] of customer) - 1); U0 A6 s# ~7 z, n; K7 e
[trade-record-all]of self3 s9 S" g& i1 i6 T0 [
;;filter [item 0 (? ) = [who] of customer] [trade-record-all] of self

% g# J- J* b8 R  H$ E, h# o
- [% f0 u: l* P) O! kset [trade-record-one] of customer item (([who] of self) - 1)
* q; g" A8 A- X2 z2 _; U% X& f[trade-record-all]of customer

( ~5 t' b0 r5 q9 r- `
9 Y2 H$ ^8 S' T2 Y0 w) K) ~3 Iset [trade-record-one-len] of self length [trade-record-one] of self
# Z5 y# z: U$ B. e
0 Q3 x- \" g4 s( w" m" r
set trade-record-current( list (timer) (random money-upper-limit))

" G! p. t8 e0 a; N) }  z, ^
1 d5 D3 l7 T0 Z0 D4 uask self [do-trust], t) g0 j& x4 ]" R* Q/ Q% Y
;;
先求ij的信任度+ {5 }# _- z' N2 _. ~3 b
2 S" ?8 F2 J! Y
if ([trust-ok] of self)
5 P5 N8 k1 }0 N: ^" o! L; C$ a3 p;;
根据ij的信任度来决定是否与j进行交易[8 M9 K; F% H3 @/ Z5 m
ask customer [do-trust] if ([trust-ok] of customer);;
这里可能会用到myself
. {. y/ E! u4 T& Q% I
! _( a  k/ L* T0 k7 \8 N  P, ~[
- ^4 X' R9 p9 @
) L2 a% N4 a. G6 B! q
do-trade
9 b5 ^- W6 q8 g( [& ?

; F" Z8 {: ^, y' _* Eupdate-credibility-ijl
  w* H( R/ f7 e+ D! a3 y
4 H, ?  s7 L: H& `9 {
update-credibility-list" S4 M( N" }: |& A9 g
/ z# V; N5 d* I) \; h

$ O; f7 f1 u+ Jupdate-global-reputation-list
6 `4 s( \( C9 W: K0 u

% ?* W- d# X9 xpoll-class

) w9 U5 l7 L5 Z/ ]' i
/ F, u, S% t2 R$ W; K7 I6 {. `8 z7 oget-color

1 k6 T) o8 T9 r5 \! J4 c" C+ X/ r0 X" H; ]6 o
]]
7 x, _0 D+ f. ]/ |6 N! O2 S( g' o. _$ z1 \7 x2 k1 t4 g
;;
如果所得的信任度满足条件,则进行交易
- _1 f; b& A2 Y$ R
+ B- e6 {. X0 u) P! }4 ?1 y4 K- ^[

& T  q: p2 [. M( C
( a2 X2 e  X9 t% p) ^$ Prt random 360
4 p2 X5 s# w0 ]8 d
+ H7 _6 [- |. v/ ]; h2 b
fd 1
: @/ ^  u) j$ }: |, q( B

9 D2 R  v: m4 r5 B6 W]
7 V4 U& ]/ ^! ?- h3 ]9 m9 H7 A
& S3 W5 c2 ]- v. X  ^/ O5 g- T3 H
end

) x- A/ N! j3 F2 Q
1 C6 J& F  h1 C3 |0 S/ `- Y, M5 y/ Vto do-trust 3 R/ O% i% |9 I7 u" E; T  `
set trust-ok False
0 g* w  D* H* h4 p! O6 s: B! {7 q4 [1 h/ b' g+ F4 |$ N

# o  r2 F4 i, \9 K8 |; M5 s- vlet max-trade-times 0
2 Q( z* f9 _2 d0 P* {foreach [trade-record-all] of customer [if item 1 (?) > max-trade-times [set max-trade-times item 1 (?)]]. _* }5 U- ?1 y3 R4 Z3 {+ ^& l
let max-trade-money 0
+ E: u5 W( y0 ^. kforeach [trade-record-all] of customer [if item 2 (?) > max-trade-times [set max-trade-times item 2 (?)]]
- p7 o: a5 s/ |, K: r. T6 @let local-proportion sqrt((item 1 [trade-record-one] of myself * item 2 [trade-record-one] of myself) /( max-trade-times * max-trade-money))+ {4 R0 [, \0 R6 i7 }" B

% U* G. G7 x( f" f+ m% q! ~5 X! }

0 N3 k% K5 m5 c  N2 e* N, |0 ^get-global-proportion6 U# G! [( S, W" V" B$ y$ C
let trust-value$ }6 g4 X7 S' V6 y. ?
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 [% m* f. O9 D7 F2 a/ Q
if(trust-value > trade-trust-value)
9 h1 `% f" v( f% r9 L* e[set trust-ok true]
  J7 R5 N7 M4 x$ R! m# l6 aend
, l' r! Q/ W. a$ T4 k
- b6 Y5 q1 c* ?& O. vto get-global-proportion3 X) N  s1 `% X) j" g
ifelse([neighbor-total]of customer = 1) and (trade-record-one-len > 3)
. f# y$ b. [3 A" j+ j[set global-proportion 0]
# q+ V9 O6 B+ `/ h- G$ u[let i 06 N3 }3 e; U$ C
let sum-money 03 U0 W- P) R! w! e
while[ i < people]0 s) H" t2 m# H
[
- {5 N2 @# ^& [2 n: U( y  oif( length (item i5 t) o3 ]! A# J
[trade-record-all] of customer) > 3 )

$ Q, |: f( M) \; _4 t& G) h5 X[
8 x% G. P7 J8 |; S. {  R) Bset sum-money (sum-money + item 2(item i [trade-record-all] of myself))
$ j" S. F& m, q]! T  Y; ~$ V% m( P' Y3 k5 z7 m
]
: s+ C8 _2 |# ^1 W6 ?" L0 Xlet j 0
& S- M( [; D; e' H! @) blet note 0
8 P# j& ?* T0 D! ]5 \while[ j < people]
  O1 q! g) t6 h6 O8 @[2 I. M: V! m. ]; h6 Y( H2 A9 _
if( length (item i! A% j" e; G' r" f3 ]
[trade-record-all] of customer) > 3 )
: t/ y4 Y5 {1 L& h6 ?& c( ]% {
[' b8 H  O, }$ B  m0 {
ifelse(item ([who]of myself - 1) [credibility] of turtle j != -1)$ D" `# b- w: u7 {, j- {
[set note (note + (item ([who]of myself - 1) [credibility] of turtle j )* item 2(item i [trade-record-all] of myself)/ sum-money)]
" S, `+ g, b4 A1 Q) l% Z% m3 p. W% `[set note (note + (item (j - 1) credibility-list) * item 2(item i [trade-record-all] of myself)/ sum-money)]9 x* F9 v( \$ _5 p% Q
]" f' F  A2 }  J0 T4 x4 y& C. w0 r
]
5 B% t1 @$ W/ R$ T- c3 U$ ]set global-proportion note
, t; B% p$ B$ u& u" [$ L1 o/ w]! f! p2 X: K; H  V! B8 F, Y
end
, c. Z5 A5 I" f* c2 ~8 S+ p0 e) w9 p9 F- W- |
to do-trade
# ?( t5 _7 M* G/ ?+ D; T2 z4 n5 ~;;
这个过程实际上是给双方作出评价的过程$ A4 U1 U! {0 Q. z' o& W; z: \8 n
set trade-record-current lput( random-float 1) trade-record-current ;;turtle 得到的评价/ A3 t! D. Y0 k6 i' f
set trade-record-current lput( random-float 1) trade-record-current ;;turtle 给出的评价2 ?' t: R6 X2 a2 Y( j. e3 C  G
set trade-record-current lput(timer) trade-record-current, N1 e, J4 r8 ~( C4 n: y( S$ g8 |. u
;;
评价时间
9 Y& p4 b6 f! a' z; jask myself [  f: X  p  O1 r* K7 h/ l; U% j8 U
update-local-reputation* c) k8 b6 ]' d3 u* ?1 x/ S/ ^
set trade-record-current lput([local-reputation] of myself) trade-record-current) U/ W) [0 o! y0 u- F' k7 t
]" p- s$ d8 R( C2 U& a2 H
set [trade-record-one] of myself lput(trade-record-current) [trade-record-one] of myself" l" m4 Q; ^: D7 d1 a( \# J
;;
将此次交易的记录加入到trade-record-one! g4 k8 e' R0 p0 n5 E
set [trade-record-all] of myself (replace-item ([who] of customer - 1 ) [trade-record-all] of myself [trade-record-one]of myself)) \& u7 P: ]3 z+ w* ?5 v( }8 s
let note (item 2 trade-record-current )$ F. S. z0 L* y
set trade-record-current
5 X5 n7 q# l" r/ U(replace-item 2 trade-record-current (item 3 trade-record-current))

- `$ |( w" H" Q$ Jset trade-record-current8 f9 Z, r" F2 T8 v# G
(replace-item 3 trade-record-current note). H  a, V4 u9 V( y2 R1 |

3 a/ f( Q! O% P; B

6 M1 C2 i% ^  E. a0 h2 F2 hask customer [
0 a- j/ R& u) E# G1 v6 Q4 m0 Wupdate-local-reputation
1 X! O9 b6 C; T5 h& J; O+ l, Dset trade-record-current7 `. v$ V6 {- Z3 x
(replace-item 4 trade-record-current ([[local-reputation] of myself]of customer))

$ \8 b8 X, x: G9 n/ G]
6 e1 m- r; `' m! {6 D8 i) k6 s% V7 ?: ~& A$ r9 r

; M, Q: K7 ?, Q( C1 @# r# jset [trade-record-one] of customer lput(trade-record-current) [trade-record-one] of customer( k' K; K+ K! Q/ _8 M; x! g
& c9 X& ]! r; V% o, @
set [trade-record-all] of customer (replace-item ([who] of myself - 1) ([trade-record-all] of customer)([trade-record-one] of customer))
+ `5 `* ]% q- E, U$ x% |;;
将此次交易的记录加入到customertrade-record-all" D( X% S& p1 I, {
end8 L9 }0 u" B( I* U
2 }" u* f( o, E: h4 t2 b
to update-local-reputation
0 r7 J) A: y! y8 n* {set [trade-record-one-len] of myself length [trade-record-one] of myself. r5 q9 \8 F0 q2 j, p% H  }/ g
7 p( r+ v" r1 i8 y1 I
& h$ E: p" l8 e
;;if [trade-record-one-len] of myself > 3
& ]0 S9 c- ?! m! s" {
update-neighbor-total3 c) Z0 E- N8 T* O( U0 ]3 n
;;
更新邻居节点的数目,在此进行
9 b5 \+ {. J: I- ilet i 37 p2 z) g# A. R0 w
let sum-time 0
& }" f( Y6 i9 ^0 j: ^# T0 Rwhile[i < [trade-record-one-len] of myself]
: o! X4 g& X# t[' q0 {) D. m3 e! o: f
set sum-time ( sum-time + item 0(item i [trade-record-one] of myself) )( k* G+ i% \9 z
set i
8 V6 }/ G5 O8 m( i + 1)

7 n. D# o! ?$ j]+ M% D! I; z: Z
let j 3" C2 I! X) i* N/ h! |6 A: T
let sum-money 0
5 a- v# n% k/ G4 t$ r' hwhile[j < [trade-record-one-len] of myself]' v" E- Y4 b. S. r1 x$ b! q$ J* n
[" ?) U. T  f; O) @5 [2 C$ x" \- g& d
set sum-money ( sum-money + (item 1(item j [trade-record-one] of myself)) * (item 0(item j [trade-record-one] of myself) ) / sum-time)
' `2 s' M& S% ^: D, }- Fset j
  X5 w% R8 |, H8 L* ?( j + 1)
, X6 G" x; Q7 r" p4 Z  D
]6 a$ b8 q) @) r' |
let k 3
! ]3 R) k& h( l6 @/ plet power 0
+ b) V2 ]8 n1 j# llet local 0
2 e4 Y# p3 B( n- w+ Q3 n3 V9 \2 Hwhile [k <[trade-record-one-len] of myself]+ n1 `4 b, F" _7 B9 H0 p7 Q; q' S7 p  j
[
; @- }+ N! A+ ^4 ]; j5 W5 I/ ]set 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)
  K5 `0 n. ]! v5 W6 I* ^set k (k + 1)
( Y& o) H& D* n% p]
) N( k+ p! D9 dset [local-reputation] of myself (local)3 Q& U9 L- C- @0 ?) d2 t2 u" k: d
end
5 p/ p; B, n4 k- p1 E1 @* N
+ y5 x) T" [7 e" b# Sto update-neighbor-total
; C/ G- [6 y# C% m- ^. g. X% @8 j; g! X' t
if([trade-record-one-len] of myself = 3) [set neighbor-total (neighbor-total + 1) ]
9 N* d4 R  y3 B! m: V4 }0 k/ b5 B9 S- o( }% O

' z. v9 J9 x/ Hend+ g# ~2 o5 m- s0 m8 [* W1 N( \
- K% V* t4 K! j% Y! f
to update-credibility-ijl
# I5 V  ]) H4 F
. y# \- K. o* |) k- x7 L;;
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。
% F0 x! Y7 k# y' S1 xlet l 0. L/ t0 C' G8 T/ e# A
while[ l < people ]  r% V8 f2 ~3 ?6 Z
;;
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
5 N/ a: z7 L. |* V[
( t; z0 X2 R4 Q* i& Y; T6 Z- D# xlet trade-record-one-j-l-len length item l ([trade-record-all] of customer)
' N8 _# e$ [' s: H  ^9 i% I$ Xif (trade-record-one-j-l-len > 3)7 R- O$ Q7 ?# A& J  g
[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
# s* @# f' H( |/ q0 x0 K$ c* y2 |let i 32 b( \8 T& d- l) |
let sum-time 0
, o  `$ ^8 ?0 A4 Ewhile[i < trade-record-one-len]  I- B$ W/ ?$ X+ Z" V* ]6 v
[
; Z3 Q6 ~+ V+ P" R' Xset sum-time ( sum-time + item 4(item i [trade-record-one] of myself) )
+ u- C) x2 b9 c  _7 rset i8 K. f! K+ t5 t- I/ m- }1 `+ W
( i + 1)

5 I& n8 N# k0 \0 V! ~]
: q% }2 p# W/ E/ l1 @1 Olet credibility-i-j-l 0
' n2 P. P" Q4 V, w8 I;;i
评价(jjl的评价)
" _: P+ W) O1 [! U4 c8 Glet j 3
& e+ [" f/ F/ ?6 L2 V8 glet k 4$ ~* `8 M: z3 p3 |/ K6 `" ^
while[j < trade-record-one-len]- w8 O* Q/ `5 K0 e+ }4 H% i0 q
[
* ^1 g* l' K4 U( O1 cwhile [((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! Q3 f1 Q2 G7 b. t5 ?2 H2 a
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)9 {; @  f: j+ G& l7 [: R( x
set j$ l( v0 [; C( G& T7 C# i
( j + 1)
. X( Q; x( V  _+ |" f8 }/ s7 k
]
5 l* `2 y: t6 wset [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 ))
( a* C1 u) n8 k, B" E+ u
9 T! Q: c1 {$ {2 e/ c

2 P8 ^6 {. l# V  |let note ((sum (item ([who] of myself - 1)([credibility-all] of turtle l)) - 1 ) / (people - 2))( k5 x( w  H# q$ Z5 p0 j3 i
;;
及时更新il的评价质量的评价
" _" f8 P3 E: J+ O0 X2 lset [credibility] of turtle l (replace-item ([who] of myself - 1)[credibility] of turtle l note) ]) l5 w  }; J: }" G) c+ j/ D# B' y
set l (l + 1)/ C$ ^7 y: x5 A* W  Q
]8 a' V- q6 ~, w$ V7 @  P* S
end
" W1 c( b3 i9 v! f1 N5 A3 A: L3 t& A+ B
to update-credibility-list
& \9 D4 r8 B# g7 ~$ y$ O) Olet i 03 v8 y# C$ F3 {: r
while[i < people], \: S# o: Y" p5 M* W
[! Z5 Q2 E; v4 L/ r; N( J9 g
let j 0/ k6 b5 j- b! g6 A: C
let note 0" s# s8 N( w0 b
let k 0
/ M/ Q2 d3 ]$ E6 B% ];;
计作出过评价的邻居节点的数目
8 m, }9 o( h  N7 }5 i/ P. c# Ywhile[j < people]
$ J& b& L: ]4 Z5 A1 E6 W9 U[  q( K- W3 {: v5 z+ U
if (item j( [credibility] of turtle (i + 1)) != -1)
. j0 Y& D$ U' |& y: ], w. V7 a4 s;;
判断是否给本turtle的评价质量做出过评价的节点, ~0 `. N3 ]- H  @
[set note (note + item j ([credibility]of turtle (i + 1)))3 k' q9 W4 ]8 I4 d9 Y1 Y
;;*(exp (-(people - 2)))/(people - 2))]
5 b) A, f# k5 S# t6 q
set k (k + 1)
0 z. i# f8 }- m]' m5 m, C% M- n( t) y2 \2 @
set j (j + 1)
/ M7 ]0 p2 N6 I; k/ S: L]
8 {, [% D9 F, Nset note (note *(exp (- (1 / k)))/ k)& ~2 S3 ]6 R7 c% W) X
set credibility-list (replace-item i credibility-list note)8 \4 {* R2 v) o$ l
set i (i + 1): |5 t  ^6 }( P
]% d/ c9 E' t- w5 K* [7 V
end
  k$ E1 s- f* h  p" z
# ^  j/ v+ b: k6 n2 Gto update-global-reputation-list; t9 ]2 B* L: {
let j 04 G' O( }) z; U2 v' E1 z( O
while[j < people]( w8 E7 {, V% {& v/ [, D( Z% E
[. d$ v% V7 P# n* S% g
let new 03 }5 x: @  o0 ^9 F
;;
暂存新的一个全局声誉
& Y" N1 }! I5 ]4 U: elet i 0. ^( ]+ o  _( p1 p, l
let sum-money 0
* u% d/ b7 p; }! }let credibility-money 0
. i9 S8 s+ M# C. n; L0 w" h8 Awhile [i < people]# Q4 _% A, N! i2 y0 t$ M
[
4 q, T7 m' J, v0 C$ }set sum-money (sum-money + item 2(item i [trade-record-all] of turtle (j + 1))); [9 d0 v" s2 }
set credibility-money (credibility-money + (item 2(item i[trade-record-all] of turtle (j + 1))) * (item j credibility-list))" [/ P: {' T! a, D( T# k, y
set i (i + 1)
7 v( B/ ]" e9 ]; N]
; K+ H2 Y, k" k2 rlet k 0+ {) B8 H0 }! O
let new1 0) ]0 `  p0 ~2 I! I6 `
while [k < people]1 j2 V  \: M0 b6 c0 P2 m
[, ?( E1 `" S# @/ [4 I; s
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)
  M6 F1 W- \0 \1 g% a# Uset k (k + 1)
) q. g  R& z- s. A! }7 t]
. N6 l5 \4 |  W; m3 H1 A" ~% P( s; j! Fset new ((exp( -(1 /(sum-money * [neighbor-total] of turtle (j + 1))))) * new1)
# O9 J2 \3 Q& B# K, [set global-reputation-list (replace-item j global-reputation-list new); }! J) Y* H% d( o
set j (j + 1)
4 K; V. o  ?) Z]
* {+ s4 ~, J8 T* Nend
5 ^& \5 n3 \9 g3 V
8 b! c5 B1 u/ S/ Y3 l& c9 X! T: D3 Y6 D' X" x3 r

) i. W8 G8 A1 oto get-color
6 J5 p# m1 Z$ O! `/ [0 K* ~& b  O3 m
set color blue

3 U7 z5 ^6 ]( y, y6 D6 z9 {end
  d: m/ A8 d& w5 s0 s- t6 B4 R/ o! Q' g0 k3 q2 d
to poll-class/ _, `; p, q# i6 T' T
end7 k4 B" Q/ A- s# j: U: x& c
! y. v* d) P: Q, `4 b2 `! Q, J5 ~
to setup-plot1
2 w, \' h2 J7 M. j
- `2 n( b- W& I  tset-current-plot "Trends-of-Local-reputation"

0 c4 m9 ^, t' p  F
/ y" x1 I. q2 b& h# P/ f& f  gset-plot-x-range 0 xmax

* H  x' E: T7 T$ L9 g
* Q9 Z. S( {0 Z4 A6 \4 eset-plot-y-range 0.0 ymax

) T. \' y6 o! b# oend3 D5 u* v8 f0 S- C9 V1 k! [

. G+ u/ a6 w/ P; rto setup-plot2$ L$ J; R/ M  R, L

! A) w" L& R6 [8 [* m6 w: bset-current-plot "Trends-of-global-reputation"

/ w' g$ N7 G  |- Z! Q  r
- W6 t6 m, i' U4 |/ z2 L5 b4 C& rset-plot-x-range 0 xmax

+ W1 e! s8 L1 S( F4 t
& b; d) y. U! X, X, k5 Oset-plot-y-range 0.0 ymax
+ |7 P/ N& Y; Y% i" B
end7 L! E9 F4 p( t- K" `& E

5 v7 n1 E3 g- bto setup-plot3
% @! _/ i, c% b. R% }# \  _5 k' j( d
! q; r9 O! R( U8 c. Xset-current-plot "Trends-of-credibility"

" B+ x% V( u, _/ q* w$ F% T3 `9 r( V( }
set-plot-x-range 0 xmax
+ {. B( ]: V3 Z0 b  {. W

1 E. _( v' A) t  @4 Mset-plot-y-range 0.0 ymax
" t: y) X) r2 t: E
end
4 W( J2 K/ c3 v$ z. h* e  r1 C' N  g: Y+ a" M' t4 [* V% k
to do-plots
1 l/ k6 t( N, u& G  Rset-current-plot "Trends-of-Local-reputation"
2 C) y8 V+ b9 P1 t8 W$ ]set-current-plot-pen "Honest service"
& _% v/ {% G* M: z' }& G8 q7 ?end
( V/ P- F, W, {0 R  Z; P; a" B! r5 f. }" ~) N
[ 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.3 _" P) {/ M, I. ~0 k+ ^5 ]- w
% v" J1 ]" B) E# C- Z* q2 H
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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