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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:
$ z  d/ H7 C8 S: e, h# B9 C+ B; ]to do-business
5 X: S9 l# W) s; I rt random 360( |' }* S. F( g  a% ^1 Z) A
fd 1
% `# i/ \$ n: O- A6 g3 Y0 R: J( ] ifelse(other turtles-here != nobody)[
! {4 X/ D' i+ C2 p. E, J5 h& Y   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.# s1 T9 ]: ]* j6 E  x2 D0 i. T
   set [trade-record-one] of self item (([who] of customer) - 1)  [trade-record-all]of self   
8 b, [. p$ |$ R* ]- E: \  j   set [trade-record-one] of customer item (([who] of self) - 1)  [trade-record-all]of customer
- {; r- w) @# ]' Z( Q; Y( q0 }   set [trade-record-one-len] of self length [trade-record-one] of self( n7 \5 D# m/ Z7 g2 k
   set trade-record-current( list (timer) (random money-upper-limit))$ u( s1 U6 W8 j( _/ T+ h$ ~. T

& l5 _% f* f) \9 }* o9 |问题的提示如下:& ~8 [* y2 L% k1 ?1 z
8 m- d$ l/ Y: \, d1 F2 }( {
error while turtle 50 running OF in procedure DO-BUSINESS$ A: `; A+ @' H7 N
  called by procedure GO$ x0 x: R+ I4 \0 e
OF expected input to be a turtle agentset or turtle but got NOBODY instead.% z$ |8 d* r$ Q: F. c% _
(halted running of go)
3 n: M$ E3 c) l- }# A- |1 q# m2 j  x* U
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~~
% X6 {0 n( p6 `5 B3 ]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
. I+ M( h! u# r9 m% U- b) g1 hglobals[
3 `3 d- `2 T) @# d: O4 Zxmax
5 a2 y- E$ G3 n! b; nymax) C& E0 X  N$ @3 a+ h! q
global-reputation-list2 K; [" t" g) |9 X, G
) F" u, y$ [/ f4 J8 n* I2 Y
;;
每一个turtle的全局声誉都存在此LIST
. F+ P; o/ M9 h! a6 ?+ q8 F' Ecredibility-list1 ?- ~5 P& J9 }9 l- L6 ~
;;
每一个turtle的评价可信度7 z5 m9 B& O" j1 x5 z9 i
honest-service) G( M/ B8 l) j% Q2 l1 C
unhonest-service
) I- H# z0 ~& {7 J2 w+ i4 e7 Soscillation
, y! n  ?3 A& n( hrand-dynamic' L6 |" F4 }# {$ F7 _3 Q" Y4 j
], f, k" A% e+ K- Z# e7 c  t) E
9 |4 @7 X* i4 J& `& T7 |
turtles-own[
, V" B+ D' {5 R6 W1 H1 G6 ]trade-record-all
2 O! T9 Y+ s& n7 J2 A/ Y;;a list of lists,
trade-record-one组成
5 c0 C9 V( L( `' t! Gtrade-record-one7 U/ J; r" V3 B8 J) \  ]
;;list,trade-record-all
中的一个list,作为暂存用,记录两个turtles的交易记录$ a6 e- B1 i% \4 s5 o

9 x# _$ D; }' ^* _( B( p;;[
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]]5 _  W5 M4 T4 w" k
trade-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]
: u. d! V) L6 d+ J9 _+ q6 p2 ]8 l! Bcredibility-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
2 I- g% L" k! |) ^" Ineighbor-total
# d9 t/ A0 M: r$ [+ l;;
记录该turtle的邻居节点的数目
, V1 _: W$ [* ktrade-time
, u# S0 Z# L, u9 M# R% z: }5 ?;;
当前发生交易的turtle的交易时间/ G+ a( h5 a. k4 G
appraise-give
4 N# Q! Z+ ?/ `/ c. w/ K! k  s9 l;;
当前发生交易时给出的评价9 d; d7 X" ^3 g' X
appraise-receive
9 p% N; r' n! E* v;;
当前发生交易时收到的评价
! [- c; u4 L: I7 x" ?appraise-time
0 M' g/ N$ D0 l, _- `;;
当前发生交易时的评价时间
  A8 e$ z  N/ E/ R" Elocal-reputation-now;;此次交易后相对于对方turtle的局部声誉
2 G5 i: D1 K7 _1 X$ D/ W' ptrade-times-total
* {9 w! k- Y% T0 ~0 o* s" Y;;
与当前turtle的交易总次数2 o7 F3 U7 Q  N7 ~; G. R# I6 a
trade-money-total  f0 g4 m. y! o/ C% ~7 t; n6 ~4 d
;;
与当前turtle的交易总金额
6 a, C/ `0 Y. {6 @local-reputation" n9 s' u3 L  e) t
global-reputation
" z! Y4 P3 F9 ccredibility
: \5 E9 N8 K7 t- C;;
评价可信度,每次交易后都需要更新
5 W  Y6 k" S0 G  y$ xcredibility-all
9 i( _. j7 c5 Z. b, j: H;;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
6 u7 j' m! _9 |' {0 M
' g. c6 d) M! E;;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
' V. d# N- |; j" F' j1 ocredibility-one+ u4 m1 h% u" E& {# a) b" u7 L
;;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: S' P9 m$ q* V4 t6 \2 r) v
global-proportion$ a1 O9 ^( Q, I# T
customer0 [$ Z+ X) v0 x$ {7 Q
customer-no
% S# ~- K5 M8 i5 B6 @trust-ok
" I2 T" R4 I# f. S: \4 K# X" Dtrade-record-one-len;;trade-record-one的长度
/ y- q" a2 I1 e8 K& ^]
5 [# p2 q7 a  h, R4 l
6 r/ S9 q, s+ M7 d% B/ s1 T5 M;;setup procedure( S1 Q8 S: F9 K8 ?/ _0 }
, c: C* P  ^3 B* I4 H
to setup
! d3 _0 f. u8 b. w; S* |3 X7 @
/ i1 A2 [6 t) ?8 `8 F6 ?3 ^ca
# z, a/ q/ G# S  J
  v% n: R. |! I  `7 N9 u
initialize-settings

* Y. ]# O0 A5 f; A& J
/ m( e: P7 G. S' z" e) ncrt people [setup-turtles]

' r5 q" d' i5 }0 q2 D9 y" P
5 m5 m1 V, }$ n- S' S. rreset-timer

% ^. A& n2 |. s( o$ Z( d6 X  r' r
) U3 x5 `7 f0 M8 y* Lpoll-class
: E- |, r% F, k* q
$ e3 `3 t2 U1 h; N9 K
setup-plots

  b5 E$ G4 p2 H5 A! `; ?1 i5 M4 y* w: }% N) o6 W/ H+ F& p# @
do-plots
' {( P; ]* S. O) g7 a- }
end* f8 c0 y2 L7 S

6 |  H+ f8 o# j- ?* f3 jto initialize-settings$ D* z0 X/ K5 X: E( s8 K% b, M

8 Q: m, O, W4 w7 L  Jset global-reputation-list []

0 u* f  Q* b& q/ N
1 ~* Q3 h7 ^7 C, ]set credibility-list n-values people [0.5]
) Q1 R) g5 }* |) m; Z6 \) o0 i

+ b9 U1 q( U( \2 A# Oset honest-service 0

: B+ w- |) f( F# @2 k
- n  b  G! ~& k4 V5 yset unhonest-service 0
9 `( O$ |0 |, i" A, R# u

- X$ Q0 b( G% i) k1 H9 F/ z1 ?set oscillation 0
0 d; J) `0 S* h
- O& n' T) ]2 c6 Q7 H6 Y1 q- }
set rand-dynamic 0
1 T& |( M3 s! P9 _3 z2 A
end
. F1 g! _4 k. |! G
( z% j1 A4 x- Z9 ]( c0 p  ~6 wto setup-turtles , ?( l: N/ n  c7 @  u7 D/ [: \
set shape "person"; _% F9 I5 J' }3 S; W
setxy random-xcor random-ycor
" h2 U* U2 L+ c. F1 x4 @set trade-record-one []& q" ^  o2 j$ e! o/ }1 Q
' K; l' |' J  p6 S0 [
set trade-record-all n-values people [(list (? + 1) 0 0)]
. f- c9 X6 r; e8 X: c

/ F0 V3 C, I5 g" ^5 J" M1 nset trade-record-current []9 o& A- j; a# g1 P, _
set credibility-receive []
4 q' A7 d$ y/ Z0 k" Y+ R% }( Gset local-reputation 0.5! C5 e; ?( A3 N; ?0 F, n
set neighbor-total 0, U9 E7 k* r' ^7 K7 N# G
set trade-times-total 0( {# ~' H- r: a9 W7 u+ N8 x# }
set trade-money-total 07 K* `" R3 |# Z: w; r/ P
set customer nobody' h" M! C+ A$ p( Q: I3 _
set credibility-all n-values people [creat-credibility]
9 c; V: `6 S' u' ]set credibility n-values people [-1]; }- P( s# p& p% ?' ?
get-color3 l  y& P" p% W3 f
2 O* s5 ]- J6 ?4 Y8 Z
end' V8 {. {1 O  {4 C6 t) e. \

" X1 ~4 U: u/ {5 ~7 }6 K* Kto-report creat-credibility
5 N, z0 t0 P/ G& p+ s* `report n-values people [0.5]
- b" L% Q$ l4 g( jend
! X6 X- U$ O: o4 I# l( N' C& F2 j1 U3 F- G% l- q& z
to setup-plots
' ^& `; N" H8 O, V3 U; p- V8 s  \
set xmax 30
# J  t3 v: t: G1 Z3 i

5 c! H! W$ `0 Nset ymax 1.0

: Z( P4 O2 j' ~# {, P. P! ?. ?& W# m4 g7 z: j& f
clear-all-plots

6 x/ K; i4 b2 ~& P
% }! G9 |4 i8 q' x8 \# `; [setup-plot1

: |0 l2 L+ N2 I+ n. E
9 t9 ~/ ?8 Y, G/ s7 ?& usetup-plot2
0 ?# g3 E# P. w# G# l2 P, r

* Q6 C/ a( O: x* s% Q3 e1 ]! A7 ysetup-plot3
4 W, a( Z# t  P+ w7 `6 h; |9 i+ N
end$ t( S5 j; c$ J9 x- z& O5 w/ G- Q
: c5 h, i+ h( J  C. ?
;;run time procedures/ J7 z( f0 b5 b4 [) Q7 S8 U
/ p% ]5 B6 n4 U  C2 t
to go4 s; y4 q: d4 q' {
, `9 I4 G9 ~! c6 ?) W: p
ask turtles [do-business]

0 {+ n4 F4 V6 @/ o2 Bend, [6 a! S9 A5 M; q" e8 Z9 h

+ l! h0 B$ i  ?9 R& ^% zto do-business
  w  |5 ~& @# F
' I6 H; S' K  j3 m/ }6 I
4 Z- B8 e/ M7 j& F9 S7 m
rt random 360
0 j* @7 T. B' L3 `" Z1 s& {7 L0 z

* @' W) w8 I; M( _, W3 t3 `fd 1
' M2 w, b2 p& w1 _

. I" L& ^! q. D) D5 r4 h  sifelse(other turtles-here != nobody)[
3 y* _# i, d9 Y) Z2 H; {9 ]

3 [4 }# Y. t. ]1 [: Q' eset customer one-of other turtles-here
% b! R7 v, y5 o, [, r

, S; R3 @6 ~8 e; _+ j% ~;; set [customer] of customer myself

! U; f( |5 I4 w4 p
" v$ s7 N2 u7 |: r/ jset [trade-record-one] of self item (([who] of customer) - 1)
2 v3 C  D* e3 H- D4 S[trade-record-all]of self
& k+ O2 Q0 w! D& k;;filter [item 0 (? ) = [who] of customer] [trade-record-all] of self

, ?% ]" X% j+ P* U
: z1 a: a( P- w9 t' eset [trade-record-one] of customer item (([who] of self) - 1)- g2 m- y3 G! W% c: P: Q
[trade-record-all]of customer
, M' N  o4 J- Y7 A. @3 P

+ |$ c3 y; p. m) N( z  F* ]3 ?9 ]4 v! Uset [trade-record-one-len] of self length [trade-record-one] of self
- ^* q* c: j! U3 Q2 t. T/ _

7 h) u- X0 a! o' I& uset trade-record-current( list (timer) (random money-upper-limit))
+ e# M) z7 J& l4 z+ c$ Y( R

& W6 t; X6 b9 E8 e; u' ]ask self [do-trust]
9 z5 R( U4 e0 g, A+ l9 G;;
先求ij的信任度! k/ J+ j; d7 N1 u7 j

3 n/ _: p/ j) A+ Y9 A- n% w6 @if ([trust-ok] of self)0 z1 Q0 R. n, Z+ \" @
;;
根据ij的信任度来决定是否与j进行交易[
1 y! C5 _0 B5 I! Zask customer [do-trust] if ([trust-ok] of customer);;
这里可能会用到myself1 F# y8 C9 ?( f$ c) Q
6 s5 g9 ^: Z* l4 i  e* N% i( ?9 u
[

9 o" Q$ [, [* N" P4 i% Z) I" R
' U4 @$ Y" F( i" q/ @; edo-trade

& d- C& g9 {& t1 g' |  R$ P# q
, o% T* d2 n5 `8 Z  `7 Zupdate-credibility-ijl
0 Q$ }7 t- K! j" B7 W& q

6 _& v  t6 H4 J# X+ cupdate-credibility-list
% _( K% C  U7 p$ @

2 o& `# V) j7 ]; h% q4 ]( ]0 U) `7 J- K8 m
update-global-reputation-list
7 n! h. O- T* L$ t, Q

2 N$ a& D  p9 upoll-class

% {6 y, n+ H6 Q) Y4 q6 ?( i  [, ]: s9 W! I
get-color
/ e( m: ?) e  h
2 F; W% e" O1 I0 e7 u
]]
) H# r0 m6 n- t* K8 L
3 K0 z- h$ ?' M% z' a3 Y- D6 q;;
如果所得的信任度满足条件,则进行交易; @9 ]; g5 r: b1 {1 R9 l
5 D8 _% U1 A+ L0 W
[

& b6 r1 L! k8 d' Z/ Y2 U
/ ?5 r4 z, n) s( S2 Irt random 360

  K( \1 c5 n' X) i
3 L7 ]& X5 j1 K2 h" }, U2 u; [fd 1

+ ~% {4 z: I) ]' q# n* E
0 P. t8 H+ a: i. L9 e, u]

4 K( ~9 K: z6 `8 a/ ~/ z7 a( d
( Q. l; }. l0 j+ j  zend

- O9 C9 h- G7 n* v1 k6 Z. D" a6 C) l( }- I1 ?' ?
to do-trust # o+ V5 y8 q3 i4 h! ]
set trust-ok False' X' @, V' R1 j' F

  v8 t' T2 d  I2 m2 z* Z  {
: h! l3 D: u4 @) I0 w% Y$ V
let max-trade-times 0: ]7 H" d) Z4 N9 t6 p9 }
foreach [trade-record-all] of customer [if item 1 (?) > max-trade-times [set max-trade-times item 1 (?)]]6 f8 U2 e4 H1 P
let max-trade-money 0
8 D, x& P, y& Q3 Fforeach [trade-record-all] of customer [if item 2 (?) > max-trade-times [set max-trade-times item 2 (?)]]% X) y- z/ H9 W4 c+ g/ Z
let local-proportion sqrt((item 1 [trade-record-one] of myself * item 2 [trade-record-one] of myself) /( max-trade-times * max-trade-money))
/ o/ ~$ }# K' q1 C- a7 h4 m& y/ @3 _) ?3 t
1 B# n( L6 J" ~% y8 C
get-global-proportion
9 _" W" a1 Z0 V% H9 }let trust-value$ l% N. P! q! Q0 ?1 a& d
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)
8 Z5 l+ Y7 Z: L. {1 P
if(trust-value > trade-trust-value)( a' u8 N% B, w* f: J2 _
[set trust-ok true]5 e. `5 j4 W: L* x+ P$ r: p
end/ E9 a" J4 q+ C3 h& m5 R

1 L' i+ u3 f+ i5 L( g* d* q, z6 G5 j3 Uto get-global-proportion
' f) u" a& |5 k- zifelse([neighbor-total]of customer = 1) and (trade-record-one-len > 3)
' n3 e! p+ J2 ]" T: R3 E[set global-proportion 0]  N2 O5 `, ]0 v4 S: A3 i2 q, J
[let i 0
& x! u$ F/ u/ n* H7 u' Olet sum-money 0
9 x+ ]+ e% J  }. {+ o. F" Z7 Lwhile[ i < people]6 B) e- J! k3 v
[2 Z. |# M. @9 W  I! t) C5 a
if( length (item i/ n3 u. M! K# D# u" F+ f0 F) J
[trade-record-all] of customer) > 3 )

, B$ ^; @4 i! a7 `! ~8 q' f[9 o' A' k2 D' D3 ^2 {
set sum-money (sum-money + item 2(item i [trade-record-all] of myself))2 w; N, f! X3 L5 U6 g. s
]; v: L+ y: d6 ?4 P: c
]7 J. Y; r9 @/ W) Q% h' `
let j 0
( i2 J: r! a/ elet note 08 K4 B: {( _2 z1 |6 |9 m. l
while[ j < people]) Y# Y5 y3 c+ P+ n3 s$ o
[" ~- y1 |: p  v2 |+ R
if( length (item i
, ]/ y0 C1 N0 V% K[trade-record-all] of customer) > 3 )

- r5 Q" W$ M7 C8 k[5 Q0 U- P+ D- Z+ V  n
ifelse(item ([who]of myself - 1) [credibility] of turtle j != -1), ?$ [/ k% g$ o6 t: Z# Y
[set note (note + (item ([who]of myself - 1) [credibility] of turtle j )* item 2(item i [trade-record-all] of myself)/ sum-money)]
3 n& N, R9 h4 y[set note (note + (item (j - 1) credibility-list) * item 2(item i [trade-record-all] of myself)/ sum-money)]
2 ^0 q+ Y  t# b]
/ e1 P, u7 Z3 V" F- W& O]) ?( ?) y% l4 j/ ]& i- A
set global-proportion note
  N* y6 W6 f, p3 c+ Z8 r5 n, p$ }]4 Y4 @( G+ ]+ I  Z1 w
end
! c  y$ u( {& d" H1 u/ z
0 x  [' X% P4 I% T, g! |to do-trade; `; ?6 l+ X) K! q" K/ j
;;
这个过程实际上是给双方作出评价的过程
% y" u0 ~$ d! h' gset trade-record-current lput( random-float 1) trade-record-current ;;turtle 得到的评价- ^" C0 g5 F6 u( Z3 R% i
set trade-record-current lput( random-float 1) trade-record-current ;;turtle 给出的评价
* @$ J* d! s0 f: t  Zset trade-record-current lput(timer) trade-record-current
5 B* u' [, _, n;;
评价时间3 U& ]- {/ d+ t/ o+ Q( l4 S' ?$ ]
ask myself [
# v# d0 d" k. m, z9 ?5 `( m9 lupdate-local-reputation; b: J. O1 x+ T. X6 b  ]
set trade-record-current lput([local-reputation] of myself) trade-record-current
9 n4 E3 H+ k* ~/ x/ R( i]
# `8 B# `# _6 j- A; S2 _9 P0 kset [trade-record-one] of myself lput(trade-record-current) [trade-record-one] of myself
: |  n% V# Y+ e( W* ]: U- O;;
将此次交易的记录加入到trade-record-one9 R5 |$ _2 c0 b
set [trade-record-all] of myself (replace-item ([who] of customer - 1 ) [trade-record-all] of myself [trade-record-one]of myself)* W& l6 H9 V/ ]6 B
let note (item 2 trade-record-current )9 B* t5 ?) k! c+ S
set trade-record-current
7 v( K/ {! T! {7 D(replace-item 2 trade-record-current (item 3 trade-record-current))

) d2 j" L9 w5 k( |# W. W( Y6 Tset trade-record-current/ ]. U3 }- ]1 D8 h+ S2 s; f: b
(replace-item 3 trade-record-current note)
' ^% h9 ?& f1 _  ?8 x( o+ q/ H+ I) E+ a' h' t
3 {- ?! D+ b- W* V5 Z
ask customer [
0 A. C2 x1 X) x: T# V9 K% a3 gupdate-local-reputation( C( t* W! E! e. L9 A
set trade-record-current
7 o  [* R/ T6 a' F: y$ Q& g(replace-item 4 trade-record-current ([[local-reputation] of myself]of customer))
7 N0 r, N) o$ x3 r, g1 `! n
]
7 z$ ?' J. a% _. ~( Z
2 f3 U" u  v# v& K% I* {7 f

( c( }" [& e2 i( Nset [trade-record-one] of customer lput(trade-record-current) [trade-record-one] of customer) Q2 n1 ?8 H) {

. _! |. V( ?) R4 H: I: ]8 ^# mset [trade-record-all] of customer (replace-item ([who] of myself - 1) ([trade-record-all] of customer)([trade-record-one] of customer))8 B* q4 K& b& d1 l. ~$ G. E) k
;;
将此次交易的记录加入到customertrade-record-all
9 O- z: C) R8 _3 `end
; s  j* Z' x0 c0 W0 R7 y8 n
, f* ?2 u! d8 y# Hto update-local-reputation; u- E2 Q2 X& u0 x( L- n: J
set [trade-record-one-len] of myself length [trade-record-one] of myself8 f- Y8 _/ x) C: S7 P* l, ~5 @

* P& E2 D; P8 j( B& L* p: O% M  b* r- W/ J4 w( _% R
;;if [trade-record-one-len] of myself > 3
$ ~, O4 b6 h% r' S, M, T4 ~2 {# i
update-neighbor-total9 a, v' z; T6 A+ c  z4 `
;;
更新邻居节点的数目,在此进行) y4 u( d' P) j( m# G
let i 3
/ U' e( W0 ]! K4 y% {let sum-time 0
  w0 |  ]2 Y1 Z, A; swhile[i < [trade-record-one-len] of myself]
; [4 l& u& x& z[7 }5 y. k/ _0 ~5 [6 M3 u
set sum-time ( sum-time + item 0(item i [trade-record-one] of myself) )5 M5 L  P9 o, a
set i
. ^- T( u( {$ g! \  w& I/ L4 N( i + 1)

; C; f4 \  G' Z( c]
) T' X9 R" d" _( i! T% y+ Llet j 3/ X1 G# e$ Q( n: O/ s; n; l" f" D
let sum-money 0& T6 ?* M% P: ]. v/ ?7 p2 X( F
while[j < [trade-record-one-len] of myself]
% x6 P& p( Z& a: w: S[' a* r4 g$ @" R1 ^. `3 J( _2 y; C6 X
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)7 Q9 f# w& p  R7 f- L. R" o
set j
8 j4 ^5 b5 A% @3 s7 D# R% t( j + 1)

7 A6 X( W2 h9 ]# U]
, V. ^7 u  m& Y' }let k 3* W5 G# D# ?6 w" d+ }# t/ w6 C) ?
let power 0
6 j) }5 A% g# W4 T3 a- W; S) @$ S  ilet local 09 G9 q. ~2 T5 Z/ v, z( g# a
while [k <[trade-record-one-len] of myself]
& K  i- _+ Q7 Z1 Q$ h9 f- a. n& h[+ C, y' l) N# |1 k8 h) K
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)
" W+ d4 D  q# k7 P( D% E7 gset k (k + 1)% l' L. p) y; L3 Y
]
4 v; m; r( |' }% a& \1 oset [local-reputation] of myself (local)
. l+ O9 X/ a2 J9 Wend0 ]" R. O: x# U, h0 t
8 n# S$ o- k7 Z3 \2 J& d
to update-neighbor-total
+ g* F8 z1 M& p4 @! v* ]
8 m8 {* L0 a; n) v; uif([trade-record-one-len] of myself = 3) [set neighbor-total (neighbor-total + 1) ]0 j9 e4 V/ Y9 k

" }' {, R2 J: w

3 S$ b5 g0 \  H, y: T/ M1 rend& n/ Z  N# p' k

  t; q8 L# U% X( F0 Sto update-credibility-ijl 9 b0 `) A; j* z5 g- f6 ]$ \

8 a8 ?; |, A$ T& T" K;;
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。8 }2 D1 d1 R3 i% F6 A& M. q- i' }
let l 0
  L1 x4 k! y0 j6 c, {: f, Swhile[ l < people ]
+ B! D) F3 {3 T$ q1 V2 c" x: Y;;
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' [8 q# a5 q) t
[
, J$ K! f' w) k- |- llet trade-record-one-j-l-len length item l ([trade-record-all] of customer)
, N( {( ~: H0 }7 S  oif (trade-record-one-j-l-len > 3): y9 \5 |+ U' k& g3 ]
[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
+ L3 D, l. q0 l/ W! t& F- rlet i 3* l) n8 q: a9 Y! t0 y2 v- s
let sum-time 04 T8 C" t8 s% w8 e5 `# L9 X
while[i < trade-record-one-len]
7 }, s2 Z7 }$ k) x[
; \! ]- ~, t. q+ _0 ~: N/ f, gset sum-time ( sum-time + item 4(item i [trade-record-one] of myself) )
! Z8 Y! e5 }' N* }" X% l! iset i
$ s' S2 t, M) j/ x( i + 1)

2 Y0 x7 j3 @1 n3 V. k$ y3 K- D# X]- W5 X% d+ p- E. b; o+ v! r0 Z; H( g3 h
let credibility-i-j-l 0
7 d: X$ h5 T* F, p& h;;i
评价(jjl的评价)  g- h3 `$ W% [' V( u$ n
let j 3" @! c; [1 ^' e
let k 4
: t4 w2 s7 v' o) s. u6 owhile[j < trade-record-one-len]
9 a2 h. L$ A8 g[
, \* g+ B9 D' {% s" [  O4 \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2 U9 c# q( T) y; ]  I) Y9 N
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" G1 O6 u! ~. B# \set j
/ n7 t" {1 A  O6 L1 {2 h. i( j + 1)

: {+ P- D) y/ e" w]0 ~$ P1 F' p" q8 v" L/ H+ S' d& O
set [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 ))
* b$ K8 V* D6 _/ K% |& u4 N
% j  T2 Y5 C0 g4 o

2 W; H% B& N- |7 G' Dlet note ((sum (item ([who] of myself - 1)([credibility-all] of turtle l)) - 1 ) / (people - 2))
  T2 v% z7 X" o' E, i;;
及时更新il的评价质量的评价
5 h7 E+ E  L8 {7 ^3 Sset [credibility] of turtle l (replace-item ([who] of myself - 1)[credibility] of turtle l note) ]: N( x" Q! t- s+ [8 _* e
set l (l + 1)
1 j2 J2 N3 ?3 v/ \$ G; u]' F7 K& o) N' U" p* }
end- g/ b) \$ u, G+ {
7 w6 Q3 c: q! r4 k
to update-credibility-list
5 g  M% \" f( |let i 04 A4 Q! X* x$ [' B4 _
while[i < people]3 {$ z% g9 Y5 Q/ A* K
[
- V# w' v$ w" A% g4 Z4 t) r; _let j 0
* X5 Q: T! h6 m7 I' {. B: L4 |let note 0( m" S$ O" {4 h7 f0 V6 y
let k 02 K' f" o' P: O
;;
计作出过评价的邻居节点的数目" K$ ]7 d& n: P
while[j < people]  l4 A2 O& y/ |+ {# C
[+ e# f9 C, `5 i6 o2 D0 `
if (item j( [credibility] of turtle (i + 1)) != -1): d  Z  I3 I- a5 f
;;
判断是否给本turtle的评价质量做出过评价的节点% I3 R9 C- b. y+ I/ R7 P
[set note (note + item j ([credibility]of turtle (i + 1)))
4 G8 N- I0 |: [; L5 @! ~4 s;;*(exp (-(people - 2)))/(people - 2))]
+ ?$ i  w# j; `
set k (k + 1)/ ]1 c% k' }- T1 p# m
]
$ _! X, j/ n! P1 X3 s8 ]( rset j (j + 1)
3 y+ [* a' G, W9 s5 _1 s]
' f, t8 m$ o% X' w3 f; M# J: o- qset note (note *(exp (- (1 / k)))/ k)
, y* S! G2 g  a! H- nset credibility-list (replace-item i credibility-list note)
. g5 b9 u1 ^' w' Lset i (i + 1)3 s/ q2 b' f9 q7 |/ f' B
]
& H9 e" C# G+ e. E7 ^2 O9 Mend2 C/ x% v: x3 c# S
- c; d" M# p, [
to update-global-reputation-list
) U* D5 r; ]9 {9 @- Olet j 0
9 ~6 g6 d8 b  a& j# t9 n" dwhile[j < people]
( I. E5 J/ p# K[! N: w0 N( o* r" v5 |/ p
let new 0
5 p! S2 o/ O% }! B* W3 S( a5 p;;
暂存新的一个全局声誉
) p0 m9 R9 u! j$ _/ Clet i 0
9 M1 m+ `  R- c1 p$ R' [( klet sum-money 03 d8 I! Y8 ^4 r9 p  @
let credibility-money 0, y3 A1 R# C  _8 q
while [i < people]) R" v5 E  J) I% q4 P9 A; f% Q% q4 ], F
[
2 T( ^5 X7 v% _8 U7 _3 J' ?2 Cset sum-money (sum-money + item 2(item i [trade-record-all] of turtle (j + 1)))
* @" x, S! Q" c3 Zset credibility-money (credibility-money + (item 2(item i[trade-record-all] of turtle (j + 1))) * (item j credibility-list))" P* o! o1 ^* _' x5 u) ^% n; ]
set i (i + 1)) u, S( y, c2 h9 T& i8 b# V
]
% r# e9 d. |, v/ klet k 04 e$ F6 [& e+ D$ K3 S3 K
let new1 0! j# O  q0 T/ a. {5 Y
while [k < people]
0 q- s( |2 q7 o+ B1 p; Y[' y# o9 a+ j2 Q. G# n( o8 j1 D- 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)! d$ }& S6 ?; |' d' K# a: ]
set k (k + 1)5 ]# W3 o6 }/ B- g) f: ]4 a2 i# ^6 N
]# D$ z5 i/ D0 E1 y
set new ((exp( -(1 /(sum-money * [neighbor-total] of turtle (j + 1))))) * new1)
8 v' Y; W2 H" ?' g5 K0 L) cset global-reputation-list (replace-item j global-reputation-list new). {' F2 _! a* z/ @$ ^& F; P" b* S$ o- P
set j (j + 1)3 H0 {# C& b  t  l+ o& X' M
]
9 i, ~' Z5 M+ K6 P- a+ |end6 @) F6 P$ I: y
& M* A  c2 J" N6 U; o1 _% L; h

. E* ?" X9 @0 |+ _2 S
* b& `: W9 a4 i  H) o/ k5 ?5 Mto get-color
; g: \, C2 d4 u+ w8 C4 N  }9 p& g6 o: p- j% b/ j2 v
set color blue
( B. ^9 u' |# K8 M* ~4 y
end5 y( l5 E; b# D6 ~

9 p* ~+ {, I& `/ x! y3 a# m! T% g# Qto poll-class0 o+ r5 Y) B2 p8 P- h" B  {7 g( b
end- N. X5 T9 U) u  |! I9 v2 }* l4 ?6 [

( H/ x1 y' N& _6 H, G0 pto setup-plot1
2 v9 _: a. G3 }- _$ v1 a# d' w6 f, }8 H
set-current-plot "Trends-of-Local-reputation"
2 q, W% b2 [" `0 b; J
$ s" Q* ]# \, Y' I! P% C$ ~
set-plot-x-range 0 xmax
: A, H5 b! I+ G+ L5 s
% W+ B3 R- E3 _  S' y) B$ Z( b
set-plot-y-range 0.0 ymax
$ O1 W/ Y9 A, {: ]% t0 x9 A4 Z$ `
end
2 e" C  z0 x5 T7 u# l) {5 T. Y; H) C
to setup-plot22 C0 r; c2 n1 b  K

6 Y1 n, ~& H( _8 H, ^set-current-plot "Trends-of-global-reputation"
  w  F* O# X9 u6 J- N

2 k; N  l5 ^$ r7 p: Jset-plot-x-range 0 xmax
& N* M/ |4 F. y! i
' D0 c( W, Y! w
set-plot-y-range 0.0 ymax

- q' o+ Y4 E  J. oend8 ?2 j8 V- T7 ~. q3 e5 W! ?$ V: r# D/ j

2 Q0 S, H: Z! _8 g2 v% Lto setup-plot3% D/ g7 ]( w: B9 d; W

* i5 L9 y( q. W5 Uset-current-plot "Trends-of-credibility"

9 k' s' g% }" ]7 p
: z; c: `0 _/ H; c1 Wset-plot-x-range 0 xmax

# b( m' b: q' a% B7 X9 @: `9 K* m" z" `$ L- H% z, Q4 @" C
set-plot-y-range 0.0 ymax

, @6 F. n; b( _8 B% z) Gend
& }& E' O9 n' H& f
" K" w8 f, g6 _! K: t9 uto do-plots
. |% h- M+ c) c& Gset-current-plot "Trends-of-Local-reputation"; l. P) ~7 f& p
set-current-plot-pen "Honest service"0 N8 }) [( W+ R8 F$ h3 ~$ F4 }( H& ]
end
+ `: B! Z6 b' y1 H1 |2 Q: g( `
# n4 h3 i& q+ G) @4 d[ 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.
$ w2 W7 w/ J/ r2 n0 m2 C' l6 `5 k3 N" [. ~0 K" X, N
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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