I am new to netlogo and facing the following error while plotting the mean of properties associated with patches:
no such plot: " patch 0 0"
error while patch 0 0 running SET-CURRENT-PLOT
called by procedure GO
called by Button 'go'
But patch 0 0 clearly exists and is predefined in the code as follows:
'globals [ k ] ; interaction constant
patches-own [ a b c d' e' ] ; state variables of properties
; a is the Proportion and variety of Blend of land use
; b is the Land uses with supportiveness for complimentary activities
; c is the Vehicular and Pedestrian Intensity
; d is the Intensity of Nodes in urban web
; e' is the Frequency of Enforced Vigilance
to setup
clear-all
set k initial-k
setup-patches
reset-ticks
end
to setup-patches
ask patches [ set pcolor yellow ] ; defines the patches as built up in an area
; to define road patches (horizontal)
ask patches [ if pycor = 0 [ set pcolor grey ] ]
ask patches [ if pxcor = 0 [ set pcolor grey ] ]
ask patches [if pycor = 9 [ set pcolor grey ] ]
ask patches [ if (pycor = 6) and (pxcor < -4 )[ set pcolor grey ] ]
ask patches [ if (pycor = 3) and (pxcor < -4 ) [ set pcolor grey ] ]
ask patches [ if (pycor = 4) and (pxcor > 3 ) [ set pcolor grey ] ]
ask patches [ if (pycor = -6) and (pxcor > 7 ) [ set pcolor grey ] ]
; to define road patches (vertical)
ask patches [ if (pycor > 0) and (pxcor = -10 ) [ set pcolor grey ] ]
ask patches [ if (pycor > 0) and (pxcor = -5 ) [ set pcolor grey ] ]
ask patches [ if (pycor < 0) and (pxcor = -7 ) [ set pcolor grey ] ]
ask patches [ if (pycor < 0) and (pxcor = -3 ) [ set pcolor grey ] ]
ask patches [ if (pycor < -3) and (pxcor = 4 ) [ set pcolor grey ] ]
ask patches [ if (pycor > 3) and (pxcor = 4 ) [ set pcolor grey ] ]
ask patches [ if (pycor > 0) and (pxcor = 7 ) [ set pcolor grey ] ]
; to define nodes as patches
ask patches [ if pxcor = 0 and pycor = 0 [ set pcolor red ] ]
ask patches [ if pxcor = 7 and pycor = 0 [ set pcolor red ] ]
ask patches [ if pxcor = -3 and pycor = 0 [ set pcolor red ] ]
ask patches [ if pxcor = -5 and pycor = 0 [ set pcolor red ] ]
ask patches [ if pxcor = -7 and pycor = 0 [ set pcolor red ] ]
ask patches [ if pxcor = -10 and pycor = 0 [ set pcolor red ] ]
ask patches [ if pxcor = 4 and pycor = 4 [ set pcolor red ] ]
ask patches [ if pxcor = 7 and pycor = 4 [ set pcolor red ] ]
ask patches [ if pxcor = 7 and pycor = 9 [ set pcolor red ] ]
ask patches [ if pxcor = 4 and pycor = 9 [ set pcolor red ] ]
ask patches [ if pxcor = 0 and pycor = 9 [ set pcolor red ] ]
ask patches [ if pxcor = -5 and pycor = 9 [ set pcolor red ] ]
ask patches [ if pxcor = -10 and pycor = 9 [ set pcolor red ] ]
ask patches [ if pxcor = -10 and pycor = 6 [ set pcolor red ] ]
ask patches [ if pxcor = -10 and pycor = 3 [ set pcolor red ] ]
ask patches [ if pxcor = -5 and pycor = 6 [ set pcolor red ] ]
ask patches [ if pxcor = -5 and pycor = 3 [ set pcolor red ] ]
; to set intial values of properties for patches
ask patches with [pcolor = yellow] [ set a random-float 0.9] ; initial a
ask patches with [pcolor = yellow] [ set b random-float 0.9] ; initial b
ask patches with [pcolor = grey] [ set c random-float 0.9] ; initial c
ask patches with [pcolor = red] [ set d' random-float 0.9] ; initial d'
ask patches with [pcolor = grey] [ set e' random-float 0.9] ; initial e'
end
to go
tick
if ticks >= 52 [ stop ]
ask patches with [pcolor = yellow]
[
let fc [c] of one-of patches with [pcolor = grey] ; reports c of any one
grey patch of neighbours
let fe' [e'] of one-of patches with [pcolor = grey] ; reports e' of any one grey patch of neighbours
let fd' [d'] of one-of patches with [pcolor = red] ; reports d' of any one red patch of neighbours
if a < 0.1 [ set a 0.1
if a > 0.9 [ set a 0.9 ] ]
if b < 0.9 [ set b b + (k * a) + (k * fc) + (k * fd')
if b > 0.9 [ set b 0.9 ] ]
if b > 0.1 [ set b b - (k * fe')
if b < 0.1 [ set b 0.1 ] ]
]
ask patch 0 0
[ let fa [a] of one-of patches with [pcolor = yellow]
let fb [b] of one-of patches with [pcolor = yellow]
let fc [c] of one-of patches with [pcolor = grey]
let fe' [e'] of one-of patches with [pcolor = grey]
let eeep (fa + fb + fc + d' + 1 / fe') / 5
let deep (1 / fa + 1 / fb + 1 / fc + 1 / d' + fe') / 5
output-print eeep
output-print deep
set-current-plot " patch 0 0"
set-current-plot-pen "eeep"
plot eeep
set-current-plot-pen "deep"
plot deep
]
end'
I have been trying to solve this for quite sometime and will be grateful for any help.
Thank you!
The patch named patch 0 0 exists. However, that does not mean that the plot named " patch 0 0" exists. You have simply mistyped the name of the plot (perhaps you have the incorrect number of spaces).
I suggest you rename your plot to something that doesn't look like a patch identifier to reduce confusion. Try something like "plot-0-0", renaming both on the interface in the plot dialogue, and also in the code.
Related
this code contains a road setup and turtle creation , after that on the go procedure that makes turtles take the pink path , and am trying to make turtles change color with they get to a red colored patch , but for unknown reason this code is not working and the cars never change their color and stay blue as there creation color
i hope i get some help to do it
turtles-own [
speed
s?
]
to setup-road
clear-all
ask patches [
ifelse pycor < -8 and pycor > -17 [set pcolor black ]
[set pcolor gray - 3 ]
if pycor < -9 and pycor > -15 [ set pcolor gray ]
if pycor > -10 and pycor < -8 and pxcor > 20 and pxcor < 27
[set pcolor white ]
if pycor < -2 and pycor > -4 and pxcor < 20 and pxcor > -24
[set pcolor pink ]
if pycor < -3 and pycor > -10 and pxcor < -22 and pxcor > -24
[set pcolor green ]
if pxcor = 20 and pycor = -3
[set pcolor red
]
]
set-default-shape turtles "car"
create-turtles 2 [
set color blue
set size 2
set xcor random-xcor
set ycor -12
set heading 90
set speed 0.1 + random-float 0.9
set s? true
]
reset-ticks
end
to go
ask turtles [
let car-ahead one-of turtles-on patch-ahead 2
if car-ahead != nobody
[ fd speed]
let gate one-of patches in-radius 5 with [pcolor = green ]
let path one-of patches in-radius 5 with [pcolor = pink ]
if s?
[ ifelse gate != nobody
[ move-to gate
fd speed
ifelse path != nobody
[
move-to path
fd speed
if patch-ahead 1 != nobody and pcolor != pink
[set color green ]
]
[fd speed]]
[fd speed]
]
]
tick
end
I want to place turtles on each of the black patches(below Figure) at a specified step size:
Therefore if step size less more turtles will be created/sprouted and more step size will result in less turtles.
Code I use right now:
ask patches with [pcolor = black][sprout-dead-turtles wall-agents [set color red]]
This gives the following result:
Previous question asked on same lines:Netlogo Sprouting turtles spaced at less than one patch
Here:
to fill-wall [ d ]
set d precision d 1 ; make sure d is a multiple of 0.1
let n precision (d / 0.1) 0 ; interval at which to hatch
ask one-of possible-next-patches [
sprout 1 [
hatch 1
let i 0
let next-patch my-next-patch
while [ next-patch != nobody ] [
face next-patch
while [ patch-ahead 0.55 != nobody and [ pcolor ] of patch-ahead 0.55 = black ] [
fd 0.1
setxy precision xcor 1 precision ycor 1 ; avoid floating point imprecisions
set i i + 1
if i mod n = 0 [ hatch 1 ]
]
set next-patch my-next-patch
]
die
]
]
end
to-report possible-next-patches
let empty-black-patches patches with [ pcolor = black and not any? turtles-here ]
report empty-black-patches with [
count neighbors4 with [ member? self empty-black-patches ] = 1
]
end
to-report my-next-patch
report one-of possible-next-patches with [ member? self [ neighbors4 ] of myself ]
end
Here is how you would use it:
to setup
ca
; draw the background:
ask patches with [ abs pxcor != max-pxcor and abs pycor != max-pycor ] [ set pcolor grey ]
ask patches with [ pycor = max-pycor and abs pxcor <= 1 ] [ set pcolor white ]
set-default-shape turtles "circle 2"
fill-wall 0.3
end
Constraints:
d has to be a multiple of 0.1
world wrapping needs to be turned off
I am new to Netlogo, and have some questions. That would be great if you could help me.
I would like to create some fruit flies moving around a tree that is made up by green patches. Fruit flies are attracted to the tree. They will turn back to the tree if fruit flies move away certain distance (such as 5 grids) from the tree.
In the beginning, they will not stop on the green patches because they have enough energy. As time passed, they will loss their energy. They will find the closest green patch, and stay on it for certain time once their energy reaches 0. They gain energy after that, and they only can do short hops from the bottom branch to the top one (3 hops). Flies will move back to the bottom branch when they are on the top part of tree. I think I need to do a WHILE loop, but I have no idea how to do that. Please look at my codes.
breed [flies fly]
breed [suns sun]
turtles-own [energy]
flies-own [count-down]
to setup
clear-all
setup-suns
setup-flies
setup-patches
reset-ticks
end
to setup-suns
;; Create the sun
set-default-shape suns "sun"
create-suns 1 [
setxy max-pxcor - 3
max-pycor - 3
set color yellow
set size 7
]
end
to setup-flies
set-default-shape flies "bee 2"
create-flies number-fly [ set color white setxy random-xcor random-ycor set count-down 15]
end
to setup-patches
;; Create sky and grass
ask patches
[ set pcolor blue ]
ask patches with [pycor < min-pycor + 2]
[ set pcolor 66 ]
;; Create trunk and branches
ask patches with [ pxcor = -15 and pycor <= 0 ] [ set pcolor brown ]
ask patches with [ pxcor = -15 and pycor < 8 and pycor > 0] [ set pcolor lime ]
ask patches with [ pxcor = pycor - 15 and pycor <= 5 and pycor > 0 ] [ set pcolor lime ]
ask patches with [ pxcor = (- pycor) - 15 and pycor <= 5 and pycor > 0 ] [ set pcolor lime ]
ask patches with [ pxcor = pycor - 8 and pycor <= 2 and pxcor > -15 ] [ set pcolor lime ]
ask patches with [ pxcor = (- pycor) - 22 and pycor <= 2 and pxcor < -15 ] [ set pcolor lime ]
ask patches with [ pxcor = pycor - 1 and pycor <= -1 and pxcor > -15 ] [ set pcolor lime ]
ask patches with [ pxcor = (- pycor) - 29 and pycor <= -1 and pxcor < -15 ] [ set pcolor lime ]
ask patches with [ pxcor = 15 and pycor <= 0 ] [ set pcolor brown ]
ask patches with [ pxcor = 15 and pycor < 8 and pycor > 0] [ set pcolor lime ]
ask patches with [ pxcor = pycor + 15 and pycor <= 5 and pycor > 0 ] [ set pcolor lime ]
ask patches with [ pxcor = (- pycor) + 15 and pycor <= 5 and pycor > 0 ] [ set pcolor lime ]
ask patches with [ pxcor = pycor + 22 and pycor <= 2 and pxcor > 15 ] [ set pcolor lime ]
ask patches with [ pxcor = (- pycor) + 8 and pycor <= 2 and pxcor < 15 ] [ set pcolor lime ]
ask patches with [ pxcor = pycor + 29 and pycor <= -1 and pxcor > 15 ] [ set pcolor lime ]
ask patches with [ pxcor = (- pycor) + 1 and pycor <= -1 and pxcor < 15 ] [ set pcolor lime ]
ask patches with [ pxcor = -26 and pycor = -3 ] [ set pcolor red ]
ask patches with [ pxcor = -10 and pycor = 5 ] [ set pcolor red ]
ask patches with [ pxcor = 21 and pycor = -1 ] [ set pcolor red ]
end
to go
move-flies
tick
end
to move-flies
ask flies [
set energy 6
ifelse energy > 10 [
;rt random 50 lt random 50 jump random-float 1 ;
let nearest-leaf min-one-of (patches with [pcolor = lime] ) [distance myself] ; Find the closest leaf within 5 grids - long range search.
if is-patch? nearest-leaf [ ; If it is a leaf, and flies will be attracted to the leaf.
face nearest-leaf
;set heading 45
;fd distance nearest-leaf
rt random 50 lt random 50 jump random-float 5 ; Protential resources make flies move actively (fast movement).
;move-to nearest-leaf ;
]
]
[
ifelse pcolor != lime
[ rt random 50 lt random 50 jump random-float 1 ; Initialization - flies fly around to search their resources.
continue]
[ stay ]
]
]
end
to continue
let nearest-leaf min-one-of (patches in-radius 1 with [pcolor = lime] ) [distance myself] ; Find the closest leaf within 2 grids - short hops.
ifelse is-patch? nearest-leaf [ ; If it is a leaf, and flies will be attracted to the leaf.
face nearest-leaf
fd random distance nearest-leaf
;ask patches in-radius 1 [set pcolor red]
;rt random 50 lt random 50 jump random-float 5 ; Protential resources make flies move actively (fast movement).
;move-to nearest-leaf ;
]
[
let turn-back min-one-of (patches with [pcolor = lime] ) [distance myself] ;
;set heading 180
face turn-back
jump random-float 5 ]
move-up ;Flies tend to move up through all branches by short hops. Need a while loop.
; Move down if they reach the top of tree
let canopy patch-at-heading-and-distance 0 1
let canopy-left patch-left-and-ahead 45 1
let canopy-right patch-right-and-ahead 45 1
if canopy != lime or canopy-left != lime or canopy-right != lime
[
move-down
]
end
to move-up
ask flies [
set heading one-of [0 30 -30]
]
end
to move-down
ask flies [
set heading one-of [180 120 -120]
]
end
to stay
set count-down count-down - 1 ;;decrement timer
set label count-down
if count-down = 0
[
rt random 50 lt random 50 jump random-float 1
set label ""
reset-count-down ;;it's another procedure
]
end
to reset-count-down
set count-down 30
end
I am sorry if you are confused by my codes. I appreciate your help. Thanks.
Kind Regards,
Ming
From your description, I think you almost certainly don't want a while loop. In a NetLogo model's go procedure, you're only specifying what happens in a single tick. So you would only use while if need it to express something that happens all in a single instant, not a process that unfolds over multiple ticks.
(Agree with Frank this is too much code to post to have a good chance of getting help. It would take quite a while for me to read and study this much code, let alone try to help you with it. In this answer I've tried to extract and address a single aspect.)
Can anyone help me with this. I'am trying to simulate a situation wherein the turtle will randomly sit on a bench (red patch) and if the bench is occupied it will find another one.
1 turtle: 1 patch
breed [kids kid]
breed [adults adult]
breed [oldies old]
kids-own [step]
adults-own [step]
oldies-own [step]
to setup
__clear-all-and-reset-ticks
ask patches [setup-world]
set-default-shape turtles "person"
create-kids number-of-kids
create-adults number-of-adults
create-oldies number-of-oldies
ask kids[
set color green
set size 1
setxy -10 0
set heading random-float 90
rt 45 - random-float 90]
ask adults[
set color orange
set size 1
setxy -10 0
set heading random-float 45
rt 45 - random-float 90]
to setup-world
set pcolor white
if ( pxcor = 10 ) and ( pycor < 10 and pycor > -11 ) [ set pcolor brown ]
if ( pxcor = -10 ) and ( pycor < 10 and pycor > 1 ) [ set pcolor brown ]
if ( pxcor = -10 ) and ( pycor < -1 and pycor > -11 ) [ set pcolor brown ]
if ( pycor = 10 ) and ( pxcor < 11 and pxcor > -11 ) [ set pcolor brown ]
if ( pycor = -10 ) and ( pxcor < 10 and pxcor > -11 ) [ set pcolor brown ]
if ( pxcor = 8 ) and ( pycor < 8 and pycor > 2 ) [ set pcolor red ]
if ( pxcor = 8 ) and ( pycor < -2 and pycor > -8 ) [ set pcolor red ]
end
to go
ask kids[
if pcolor = red and not any? other turtles-here[
move-to patch-here
stop]
fd 1
ifelse pcolor = red and any? other turtles-here
[rt random 90]
[fd 1]
]
ask adults[
if pcolor = red and not any? other turtles-here[
move-to patch-here
stop]
fd 1
ifelse pcolor = red and any? other turtles-here
[rt random 90]
[fd 1]
]
tick
end
you have already done most of the coding in the right way, I have tested your code and it works fine except your second condition in your go function for kids and adults.
One way to do the same thing is adding a turtle variable for example seated? Variable and make it false at initialization and make it true if the turtle is sitting on a bench. And only ask turtles with false seated? to look for another bench.
turtles-own [seated?]
ask kids with [not seated? ][
rt random 10
fd 1
if pcolor = red and not any? other turtles-here [
move-to patch-here
set seated? true]
]
ask adults with [not seated?]
[
rt random 10
fd 1
if pcolor = red and not any? other turtles-here[
move-to patch-here
set seated? true]
]
I have tested the code by showing number of turtles in each pacth and there was only one turtle per red patch
ask patches with [pcolor = red ][set plabel count turtles-here]
In this model all it does is turtle will find a seat(red patch for available and yellow for taken). And once the seats are all occupied it all will stop.
Now how to make some of the turtles move again? Like if it is seated it will move again and try go another place or it will go out.
breed [kids kid]
breed [adults adult]
breed [oldies old]
kids-own [step]
adults-own [step]
oldies-own [step]
turtles-own [seated?]
to setup
__clear-all-and-reset-ticks
ask patches [setup-world]
ask patches with [pcolor = red ][set plabel count turtles-here]
set-default-shape turtles "person"
create-kids number-of-kids
create-adults number-of-adults
create-oldies number-of-oldies
ask kids[
set color green
set size 1
setxy -10 0
set heading random-float 90
rt 45 - random-float 90]
ask adults[
set color orange
set size 1
setxy -10 0
set heading random-float 45
rt 45 - random-float 90]
ask oldies[
set color blue
set size 1
setxy -10 0
set heading random-float 45
rt 45 - random-float 90]
end
to setup-world
set pcolor white
if ( pxcor = 10 ) and ( pycor < 10 and pycor > -11 ) [ set pcolor brown ]
if ( pxcor = -10 ) and ( pycor < 10 and pycor > 1 ) [ set pcolor brown ]
if ( pxcor = -10 ) and ( pycor < -1 and pycor > -11 ) [ set pcolor brown ]
if ( pycor = 10 ) and ( pxcor < 11 and pxcor > -11 ) [ set pcolor brown ]
if ( pycor = -10 ) and ( pxcor < 10 and pxcor > -11 ) [ set pcolor brown ]
if ( pxcor = 8 ) and ( pycor < 8 and pycor > 2 ) [ set pcolor red ]
if ( pxcor = 8 ) and ( pycor < -2 and pycor > -8 ) [ set pcolor red ]
end
to go
if count patches
with [pcolor = yellow and any? other turtles-here] = 10
[stop]
ask kids with [seated? = 0][
rt random 10
fd 2
if pcolor = red and not any? other turtles-here [
move-to patch-here
set seated? true
set pcolor yellow
]
]
ask adults with [seated? = 0]
[
rt random 10
fd 1.5
if pcolor = red and not any? other turtles-here[
move-to patch-here
set seated? true
set pcolor yellow
]
]
ask oldies with [seated? = 0]
[
rt random 10
fd 1
if pcolor = red and not any? other turtles-here[
move-to patch-here
set seated? true
set pcolor yellow
]
]
tick
end
Just the way you asked non-seated turtles by ask ... with [Seated? = 0] you can ask others by ask ... with [Seated? = 1]
However, I will suspect that they will go in a loop, because they are close to the bench ans bench is empty, so as soon as they stand up they will sit on the same spot again. Maybe you can have a memory [] which stores last few moves and if there is a seated position, say in last 10 items it will choose not to sit. I am not sure what are your requirements, this is just an example.
ask adults with [seated? = 1]
[
; Stand up set seated? = 0
; go around
]
ask kids with [seated? = 1]
[
; Stand up set seated? = 0
; go around
]
ask oldies with [seated? = 1]
[
; Stand up set seated? = 0
; go around
]
Update:
I have changed your code, its not much different from your code, but it has memory function to make sure turtles move around after leaving a bench and are not going to sit on same bench again and to some degree avoid walls (you need to improve the avoiding since step size is different for each agent):
breed [kids kid]
breed [adults adult]
breed [oldies old]
Globals [out-of-boundry]
turtles-own [seated? memory step]
to setup
clear-all
reset-ticks
ask patches [setup-world]
ask patches with [pcolor = red ][set plabel count turtles-here]
set out-of-boundry patches with [ pycor > 10 or pxcor < -10 or pxcor > 10 or pycor < -10 or pcolor = brown]
set-default-shape turtles "person"
create-kids 5 [
set memory []
set seated? false
set color green
set size 1
setxy -10 0
set heading random-float 90
rt 45 - random-float 90
set step 2
]
create-adults 5 [
set memory []
set seated? false
set color orange
set size 1
setxy -10 0
set heading random-float 45
rt 45 - random-float 90
set step 1.5
]
create-oldies 5 [
set memory []
set seated? false
set step 1
set color blue
set size 1
setxy -10 0
set heading random-float 45
rt 45 - random-float 90
]
end
to setup-world
set pcolor white
if ( pxcor = 10 ) and ( pycor < 10 and pycor > -11 ) [ set pcolor brown ]
if ( pxcor = -10 ) and ( pycor < 10 and pycor > 1 ) [ set pcolor brown ]
if ( pxcor = -10 ) and ( pycor < -1 and pycor > -11 ) [ set pcolor brown ]
if ( pycor = 10 ) and ( pxcor < 11 and pxcor > -11 ) [ set pcolor brown ]
if ( pycor = -10 ) and ( pxcor < 10 and pxcor > -11 ) [ set pcolor brown ]
if ( pxcor = 8 ) and ( pycor < 8 and pycor > 2 ) [ set pcolor red ]
if ( pxcor = 8 ) and ( pycor < -2 and pycor > -8 ) [ set pcolor red ]
end
to go
if count patches with [pcolor = yellow and any? other turtles-here] = 10 [stop]
ask turtles [
set memory lput Seated? memory
restrict-memory
ifelse seated?
[stand-up ]
[ move-in-the-brown-area step
sit]
]
tick
end
to move-in-the-brown-area [step-size]
ifelse not member? patch-ahead step-size out-of-boundry [
fd step-size
rt random 10
]
[ face one-of patches with [pcolor = white]
fd step-size
]
If member? patch-here out-of-boundry[
let target patch -10 0
face target
fd step-size]
end
to restrict-memory
;assume your memory-limit is 5
let memory-limit 5
if length memory >= memory-limit
[ set memory but-first memory ]
end
to stand-up
if seated?
[ set seated? false
set pcolor red
fd 1
]
end
to sit
if pcolor = red and not any? other turtles-here with [not member? true memory][
move-to patch-here
set seated? true
set pcolor yellow
]
end