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ex02/hysterese.nlogo 0 → 100644
View file @ f27eacfd
globals [
field-strength ; Strength of the electromagnetic field
positive-count ; Number of positive turtles
]
turtles-own [
status ; Status of the turtle, either +1 or -1
]
; Setup procedure
to setup
clear-all
set field-strength 0
ask patches [
sprout 1 [ ; Each patch creates one cell (turtle)
ifelse random-start [set status one-of [-1 1]] [set status -1]
;Randomize initial status if wanted
update-color ; Set color based on initial status
]
]
update-counts
setup-plot
reset-ticks ; Reset iterations
end
; If you want to reset the field strength but don't want to reset the cells
; eg switch the external field after all cells are flipped
to reset-field
set field-strength 0
end
; Go procedure
to go
ask turtles [
switch-status
]
set field-strength field-strength + field-increase ; Increment the field strength
update-counts
update-plot
; Termination
if (field-strength > 0 and all? turtles [status = 1]) or (field-strength < 0 and all? turtles [status = -1]) [
stop ; End the simulation when all turtles have the same status as the external field
]
tick
end
; Procedure for turtles to switch status based on neighbors and field strength
to switch-status
let different-neighbor-statuses count turtles in-radius 1 with [status != [status] of myself]
let neighbor-influence-weight (different-neighbor-statuses / 8) * neighbor-influence
; if field-strength and own status are both negative / positive then 0 else field strength as influence
let field-influence-weight ifelse-value (field-strength * status > 0) [0] [abs field-strength * field-influence]
let probability-to-switch neighbor-influence-weight + field-influence-weight
if random-float 1 < probability-to-switch [
set status (- status)
update-color
]
end
; Procedure to update the color based on status
to update-color
set color ifelse-value (status = 1) [green] [red]
end
; Procedure to update the counts of positive and negative turtles
to update-counts
set positive-count count turtles with [status = 1]
end
; Procedure to update the plot with the current field strength and percentages
to update-plot
set-current-plot "Hysteresis Curve"
let total-count (count turtles)
let positive-percentage ifelse-value (total-count > 0) [positive-count / total-count * 100] [0]
set-current-plot-pen "Positive Percentage"
plotxy field-strength positive-percentage
end
; Procedure to setup the plot at the beginning
to setup-plot
set-current-plot "Hysteresis Curve"
clear-plot
set-current-plot-pen "Positive Percentage"
plotxy 0 0 ; Start plot at field strength 0
end
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@#$#@#$#@
## WHAT IS IT?
(a general understanding of what the model is trying to show or explain)
## HOW IT WORKS
(what rules the agents use to create the overall behavior of the model)
## HOW TO USE IT
(how to use the model, including a description of each of the items in the Interface tab)
## THINGS TO NOTICE
(suggested things for the user to notice while running the model)
## THINGS TO TRY
(suggested things for the user to try to do (move sliders, switches, etc.) with the model)
## EXTENDING THE MODEL
(suggested things to add or change in the Code tab to make the model more complicated, detailed, accurate, etc.)
## NETLOGO FEATURES
(interesting or unusual features of NetLogo that the model uses, particularly in the Code tab; or where workarounds were needed for missing features)
## RELATED MODELS
(models in the NetLogo Models Library and elsewhere which are of related interest)
## CREDITS AND REFERENCES
(a reference to the model's URL on the web if it has one, as well as any other necessary credits, citations, and links)
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ex02/simulation.mkv 0 → 100644
View file @ f27eacfd
File added