NETLOGO:最近3个刻度中存储和使用变量的值 [英] NETLOGO: Storing and using the value of a variable in the last 3 ticks

问题描述

我正在尝试为股票市场建模.我正在尝试给代理商一种特定的行为，以他们对价格的预测为基础. 因此，基本上，每个代理商都可以预测股票的价格.在设置过程中，将随机的预测价格分配给每个代理商.随着时间的流逝，预计价格应按以下方式计算: 最近3个周期的预测价格总计/3

I am trying to model a stock market. I am trying to give agents a certain kind of behaviour to base their prediction of the prices on. So basically, every agent predicts the price of the share. In the Setup procedure, a random predicted price is assigned to each agent. As the time passes, the predicted price is supposed to be calculated as follows: total of predicted price of the last 3 periods / 3

我不知道该如何解决这个问题.我尝试使用最后一个命令，但是它不起作用.我当时正在考虑制作一种矢量，但我做不到.有线索吗?

I don't know how to approach this issue. I tried using the last command but it does not work. I was thinking about making a sort of vector but I couldn't do so. Any leads?

这是我到目前为止尝试过的:

This is what I have tried so far:

ask turtles [
set pre-price (pre-price + last [pre-price] of turtles + last [last [pre-price] of turtles] of turtles) / 3 ]
end

最后一条命令无法正常运行，因为我试图手动计算结果，并且它们与该命令不一致.有什么想法吗?

The last command does not work as I want it to work because I have tried to manually calculate the results and they don't reconcile with this command. Any idea on how to go about it?

谢谢！

推荐答案

这实际上是一个非常有趣的错误.

This is actually a very interesting bug.

问题在于，在您的海龟看涨期权中，您假设所有海龟的预价"都是静态的.但是，对于每个代理，他们都在分配变量.

The issue is that inside your turtle call, you assume all the turtles "pre-price" is static; however, with each agent, they are assigning the variable.

我建议引入另一个变量，该变量显式存储每个刻度的价格(使用矩阵/嵌套列表)

I'd suggest to introduce another variable which explicitly stores the pre-prices for each tick (using a matrix/nested list)

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