Simple R Extension Dictionary: set

sr:set

sr:set variable-name value

Sets a variable in the R session with the given name to the given NetLogo value. NetLogo objects will be converted to R objects as expected.

Note that lists in NetLogo are converted into lists in R if the elements are of different types. If all the elements of a NetLogo list are of the identical number, boolean, or string type then the data will be automatically converted into a vector in R.

sr:set "x" 42
sr:run "print(x)" ;; prints `[1] 42` to the command center
sr:set "y" [1 2 3]
sr:run "print(typeof(y))" ;; prints `[1] "double"` to the command center
sr:run "print(typeof(list(y)))" ;; prints `[1] "list"` to the command center
sr:run "print(y)" ;; prints `[1] 1 2 3` to the command center
show sr:runresult "y" ;; reports [1 2 3]

Agents are converted into lists with named elements for each agent variable.

Agentsets are converted into a list of the above lists. If you want to convert agents to a data frame, see sr:set-agent-data-frame. If you want to use sr:set and do the conversion manually, try the following:

my_data_frame <- as.data.frame(do.call(rbind, <agentset-list-of-lists>))

For example:

breed [goats goat]
goats-own [energy ]
create-goats 2 [ set color 75 ]
ask goat 0 [ set energy 42 set xcor 5]
ask goat 1 [ set energy -42 set xcor -5]

sr:set "goat" goat 0
sr:run "print(typeof(goat))" ;; prints `[1] "list"` to the command center
sr:run "print(goat)"
;; Should output:
;; $WHO
;; [1] 0
;;
;; $COLOR
;; [1] 75
;; (etc.)

sr:set "goats_list_of_lists" goats
sr:run "goats_data_frame <- as.data.frame(do.call(rbind, goats_list_of_lists))"
sr:run "print(goats_data_frame)"
;; Should output:
;;   WHO COLOR HEADING XCOR YCOR   SHAPE LABEL LABEL-COLOR BREED HIDDEN? SIZE
;; 1   0    75      82    5    0 default               9.9 GOATS   FALSE    1
;; 2   1    75     200   -5    0 default               9.9 GOATS   FALSE    1
;;   PEN-SIZE PEN-MODE ENERGY
;; 1        1       up     42
;; 2        1       up    -42
;;

Agents with variables containing references to agentsets will have those variables converted into the string representation of that agentset.