NetLogo creates turtles from list values
I have successfully loaded the values from a tab-delimited data file (.txt) into a list box, with xcor, ycor and color values for each of the 10 turtles. I read the data using:
file-open "File Input Load Turtles.txt"
set turtle-data sentence turtle-data (list (list file-read file-read file-read))
I am now trying to create 10 new turtles based on the values in the new list. I tried the following syntax (among many unsuccessful attempts):
foreach turtle-data crt set xcor first ? set ycor item 1 ? set color last ?
Firstly? in the foreach command, NetLogo reports the error "This special variable is not defined here."
Can anyone tell me the correct syntax to iterate over a list of 10 subscriptions to do the xcor set, set ycor, and set the color commands in the foreach loop to create 10 turtles?
Many thanks!
source to share
It's just a syntactic problem. NetLogo understands foreach turtle-data crt
as a value foreach turtle-data [ crt ? ]
and then the rest are parsed as separate commands hence you see an error.
Do you want to:
foreach turtle-data [
crt 1 [
set ...
]
]
with square brackets to delimit where the body of the loop starts and ends. Please note that you must provide a number crt
.
source to share