我想能不能先做一个变量p$ t& N7 @2 E4 z+ ~
let p random-float 1.06 G& T( R+ |9 W$ y- }7 j& `7 y" N. s8 k
ifelse (p< a*b) # W/ E6 K# O3 x: T
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set pcolor white * a6 i* E% M2 T3 H0 g9 a5 ~ H% P6 u ] 4 _ T/ c4 D5 R6 D [+ f. @$ ~8 c6 f7 q$ v2 h
set pcolor red / I; j, ~* W% t3 |) R$ e' c ]7 b7 E% P& M& N, X1 O/ v
呵呵,不知道行不行# E+ Z. V# w. R
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