问题
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
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?
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
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?
Thank you!
回答1:
This is actually a very interesting bug.
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.
I'd suggest to introduce another variable which explicitly stores the pre-prices for each tick (using a matrix/nested list)
来源：https://stackoverflow.com/questions/55652441/netlogo-storing-and-using-the-value-of-a-variable-in-the-last-3-ticks