如何計算標題的加權平均值？

Question

Get mean heading of neighboring turtles

to-report mean-heading [ headings ] 
    let mean-x mean map sin headings 
    let mean-y mean map cos headings 
    report atan mean-x mean-y 
end 

從這個答案讓我中途有，但我想要的是每個標題的對海龜的大小進行加權。

像

sum [heading * size] of turtles/sum [size] of turtles 

但是，這會，你知道，實際工作。

Answer 1

如果您接受turtleset而不是標題的列表，然後：

to-report weighted-mean-heading [turts] 
    let mean-x mean [size * sin heading] of turts 
    let mean-y mean [size * cos heading] of turts 
    report atan mean-x mean-y 
end