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新手发问超简单问题，目前还处于研读范例码的阶段，边测边看结果来理解程序
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ask turtles with [ infected? = true ] , c( k% Y$ V$ v
我原本以为这句会回传『所有』infected? = true 的 turtle L8 o1 k' F! L* C% B
但看结果似乎不是这样。& ?0 K" ~! y% i. x
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假设所有符合条件的有 5 笔
) X0 L) N2 a3 E4 w8 y有时候回传 1 笔，有时回传 3 笔，是不固定的3 j) ]) q7 \" A- t: I
回头查语法定义1 s$ g; d- Z2 F K' s8 u
with
* ^4 p1 F% ~5 l) ?7 T0 Y' Vagentset with [reporter]
9 ^6 ^2 `+ L5 M& L' y- m$ qTakes two inputs: on the left, an agentset (usually "turtles" or "patches"). On the right, a boolean reporter. Reports a new agentset containing only those agents that reported true -- in other words, the agents satisfying the given condition.+ t0 L1 Z$ N+ z
它只说回传 agents satisfying the given condition& ~9 `$ ^0 V/ @7 n% r
是否 with 回传的是『符合条件』的数据，而不是『所有符合条件』的数据 ?
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想确定一下+ M8 x; u# R$ g0 X6 `9 x4 j2 ]& X% e, A
谢谢！5 X3 g6 y5 |7 k2 [ J# A3 R7 V
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楼主
发表于 2013-11-7 00:02:20
