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我仍然遇到问题[histogram]

我有一个全局变量(age-sick),它存储海龟生病时的年龄......我想绘制分布:histogram age-sick

但是,我想要每个年龄段生病的海龟的绝对数量,而是相对数量。有没有办法这样做?

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我试图通过以下方式克服这个问题:​​​

let age-freq (list)
let i 0
while [ i <= (max age-sick)] [
let a filter [? = i] age-sick
repeat (length a / length age-sick * 1000) [set age-freq lput i age-freq]
set i i + 1]
histogram age-freq]
于 2016-05-05T14:59:23.777 回答