Using to-reports while creating agents from a csv file

Question

My question is a bit long. I really appreciate it if you could please read it all and I\'d be very grateful for any piece of advice.

I have data related to 2 consumers a

Answer 1

In response to your comment- got it, thought that might be the case. I will present an alternative approach that may or may not suit you, but it's probably how I would tackle this. The main difference is that I would store the lists for screen and battery ratings in a turtle variable, so you can easily access them after the fact without having to track counters. Given these variable declarations:

extensions [ csv ]

globals [ screen-headings battery-headings]

turtles-own [ 
  turtle-screen-list 
  turtle-battery-list
  turtle-screen-eval
  turtle-bat-eval
  turtle-sum-eval
  turtle-row-number
]

I would split headings of the csv file to the screen-headings and battery-headings globals.

Then, I would iterate through the next lines of the csv, as you did below, and split the lines in a similar way but into the turtles-own variables turtle-screen-list and turtle-battery-list. That way, each turtle is aware of its own ratings for each screen and battery so you can modify your evaluated screen or battery as needed.

Set the screen and battery of interest with screen-to-evaluate and battery-to-evaluate (or use a Chooser on the interface), then use a reporter (similar to what you had set up) that checks the position of the battery and screen of interest to return the current turtle's rating for each- this will set turtle-screen-eval and turtle-bat-eval. Finally, sum those last two values.

to setup
  ca
  reset-ticks
  file-close-all
  file-open "turtle_details.csv"
  let headings csv:from-row file-read-line
  set screen-headings sublist headings 0 4
  set battery-headings sublist headings 4 length headings

  let screen-to-evaluate 13.5
  let battery-to-evaluate 24

  while [ not file-at-end? ] [
    let data csv:from-row file-read-line
    create-turtles 1 [
      set turtle-screen-list sublist data 0 4
      set turtle-battery-list sublist data 4 length data
      set turtle-screen-eval turtle-screen-rating screen-to-evaluate
      set turtle-bat-eval turtle-battery-rating battery-to-evaluate
      set turtle-sum-eval turtle-screen-eval + turtle-bat-eval
    ]
  ]
  file-close-all

end

to-report turtle-screen-rating [sc]
  let pos position sc screen-headings
  let turt-screen-rate-value item pos turtle-screen-list
  report turt-screen-rate-value
end

to-report turtle-battery-rating [bc]
  let pos position bc battery-headings
  let turt-bat-rate-value item pos turtle-battery-list
  report turt-bat-rate-value
end

Of course, you can condense some of this as needed. I tested this setup with 4 rows (patterned after your example data) and it seemed to work ok. If you have a huge number of rows it might not work so well.

Edit:

If you end up replacing screen-to-evaluate and battery-to-evaluate with interface choosers (which I recommend- it allows you to quickly see the different values), you can update to the new values with something like:

to update-vals
  ask turtles [
    set turtle-screen-eval turtle-screen-rating scrn
    set turtle-bat-eval turtle-battery-rating batr
    set turtle-sum-eval turtle-screen-eval + turtle-bat-eval
  ]
end

where scrn and batr are the names of the choosers.

Or, if you want them to dynamically update, you can make an interface monitor that reports the following reporter :

to-report update
ask turtles [
    set turtle-screen-eval turtle-screen-rating scrn
    set turtle-bat-eval turtle-battery-rating batr
    set turtle-sum-eval turtle-screen-eval + turtle-bat-eval
  ]
  report "Dynamically updating."
end

With that one, as soon as you change the Chooser value, the turtles should immediately update their turtle-bat-eval, turtle-screen-eval, and turtle-sum-eval. Fun!

Edit 2

If your csv includes a column for row numbers like this:

row 12 13.5 14 15  5 12 24 30
1   1  2.0  1  3  2  2  4  5
2   4  3.0  1  2  1  1  2  3

I would recommend creating a turtle variable to store the row number used. I've now included one called turtle-row-number. Then, you would just have to include a line to update that variable from the first item in the list, which is the row number, and then modify your sublist values accordingly, to something like:

to setup-row-nums
  ca
  reset-ticks
  file-close-all
  file-open "turtle_details_2.csv"
  let headings csv:from-row file-read-line
  set screen-headings sublist headings 1 5
  set battery-headings sublist headings 5 length headings

  while [ not file-at-end? ] [
    let data csv:from-row file-read-line
    create-turtles 1 [
      set turtle-row-number first data 
      set turtle-screen-list sublist data 1 5
      set turtle-battery-list sublist data 5 length data
    ]
  ]
  update-vals
  file-close-all

end

Where update-vals is as shown above.