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Programming for Social Scientists Lecture 8

Programming for Social Scientists Lecture 8. UCLA Political Science 209-1: Programming for Social Scientists Winter 1999 Lars-Erik Cederman & Benedikt Stefansson. Today’s topics. More graphics Using probes With GUI To get and manipulate data Probes in action: The Script class

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Programming for Social Scientists Lecture 8

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  1. Programming for Social ScientistsLecture 8 UCLA Political Science 209-1: Programming for Social Scientists Winter 1999 Lars-Erik Cederman & Benedikt Stefansson

  2. Today’s topics • More graphics • Using probes • With GUI • To get and manipulate data • Probes in action: The Script class • Overriding methods

  3. Want to put a black border around each square on the lattice In order to do so must “paint” each tile independently Solution: A new message in ObserverSwarm Changing the raster graphics Raster from GridIPD New Raster

  4. Need to catch the display message from each agent and implement new drawing method In -buildObjects: worldDisplay = [ModObject2dDisplay createBegin: self]; [worldDisplay setDisplayWidget: (id <Raster>) self]; [worldDisplay setDiscrete2dToDisplay: [modelSwarm getWorld]]; [worldDisplay setObjectCollection: [modelSwarm getPlayers]]; [worldDisplay setDisplayMessage: M(drawSelfOn:)]; [worldDisplay setSizeFactor: sizeFactor]; worldDisplay = [worldDisplay createEnd]; Changes in ObserverSwarm.m

  5. Changes in ObserverSwarm.m (2) • Agents call the “displayWidget” which is actually the ObserverSwarm and we process the information before calling the raster -drawPointX: (int) posX Y: (int) posY Color: (int) type { [worldRaster fillRectangleX0: sizeFactor*posX Y0: sizeFactor*posY X1: sizeFactor*(float)(posX+0.9) Y1: sizeFactor*(float)(posY+0.9) Color: type]; return self; }

  6. How it works -makeProbeAtX:Y: Object2dDisplay Agent -drawSelfOn: Raster ObserverSwarm -drawPointX:Y:Color: ObserverSwarm -fillRectangleX0:Y0:X1:Y1:

  7. Useful methods in Raster - fillRectangleX0: (int)x0 Y0: (int)y0 X1: (int)x1 Y1: (int)y1 Color: (Color)color Fill a rectangle of given geometry and color. - ellipseX0: (int)x0 Y0: (int)y0 X1: (int)x1 Y1: (int)y1 Width: (unsigned)penWidth Color: (Color)c Draw an ellipse of given geometry, pen width, and color. - lineX0: (int)x0 Y0: (int)y0 X1: (int)x1 Y1: (int)y1 Width: (unsigned)penWidth Color: (Color)c Draw a line of given geometry, pen width, and color. - rectangleX0: (int)x0 Y0: (int)y0 X1: (int)x1 Y1: (int)y1 Width: (unsigned)penWidth Color: (Color)c Draw a rectangle of given geometry, pen width, and color.

  8. Graphical probes main Probe Probe Observer Swarm Model Swarm bugList

  9. How the probes come in... A custom ProbeMap with 1 MessageProbe Model Swarm Observer Swarm A custom ProbeMap with 4 MessageProbes ControlPanel is provided by kernel

  10. Brief overview of probes • Two major uses for probes • To interface with an object • To create a GUI to an object • Interface with an object of two types • VarProbe: Probes an instance variable • MessageProbe: Probes a method • GUI utilities: • ProbeMap: Collection of Var and MessageProbes

  11. Major Probe classes Probe Library Object Base Probe Probe Map VarProbe Message Probe Custom Probe Map Complete Probe Map Complete Var Map

  12. Check out instance of EmtpyProbeMap Attach VarProbe or MessageProbe to each variable or message to appear on GUI Put each probe on ProbeMap Ask probeDisplayManager to create actual widget Creating graphic probe to object A ProbeMap 1 MessageProbe 2 3 VarProbes 4 Object

  13. Code for previous example Model probeMap=[EmptyProbeMap createBegin: aZone]; [probeMap setProbedClass: [self class]]; probeMap=[probeMap createEnd]; [probeMap addProbe: [probeLibrary getProbeForVariable: ”someVar" inClass: [agent class]]]; ... [probeMap addProbe: [probeLibrary getProbeForMessage: ”someVar" inClass: [agent class]] setHideResult: 1]]; [probeLibrary setProbeMap: probeMap For: [self class]]; [probeDisplayManager createProbeDisplayFor: modelSwarm]; Observer

  14. probeMap = [EmptyProbeMap createBegin: self]; [probeMap setProbedClass: [self class]]; probeMap = [probeMap createEnd]; [probeMap addProbe: [probeLibrary getProbeForVariable: "worldXSize” inClass: [self class]]]; [probeLibrary setProbeMap: probeMap For: [self class]]; (also must execute CREATE_PROBE_DISPLAY macro in ObserverSwarm) Example: A variable probe 1 2 3 4

  15. probeMap = [EmptyProbeMap createBegin: self]; [probeMap setProbedClass: [self class]]; probeMap = [probeMap createEnd]; [probeMap addProbe: [[probeLibrary getProbeForMessage: ”setWorldXSize:” inClass: [self class]] setHideResult: 1]]; [probeLibrary setProbeMap: probeMap For: [self class]]; (also must execute CREATE_PROBE_DISPLAY macro in ObserverSwarm) Example: A message probe 1 2 3 4

  16. A probe for ModelSwarm in IPD +createBegin: (id) aZone { ... probeMap = [EmptyProbeMap createBegin: aZone]; [probeMap setProbedClass: [self class]]; probeMap = [probeMap createEnd]; [probeMap addProbe: [probeLibrary getProbeForVariable: "randomSeed" inClass: [self class]]]; [probeMap addProbe: [probeLibrary getProbeForVariable: "worldSize" inClass: [self class]]]; [probeMap addProbe: [probeLibrary getProbeForVariable: "pALLC" inClass: [self class]]]; [probeMap addProbe: [probeLibrary getProbeForVariable: "pTFT" inClass: [self class]]]; [probeMap addProbe: [probeLibrary getProbeForVariable: "pATFT" inClass: [self class]]]; [probeMap addProbe: [probeLibrary getProbeForVariable: "pALLD" inClass: [self class]]]; [probeLibrary setProbeMap: probeMap For: [self class]]; ...

  17. [probeMap addProbe: [probeLibrary getProbeForVariable: "randomSeed" inClass: [self class]]]; [probeMap addProbe: [probeLibrary getProbeForVariable: "worldSize” inClass: [self class]]]; [probeMap addProbe: [probeLibrary getProbeForVariable: "pALLC" inClass: [self class]]]; [probeMap addProbe: [probeLibrary getProbeForVariable: "pTFT" inClass: [self class]]]; [probeMap addProbe: [probeLibrary getProbeForVariable: "pATFT”inClass: [self class]]]; [probeMap addProbe: [probeLibrary getProbeForVariable: "pALLD" inClass: [self class]]]; Code for the ModelSwarm probe

  18. ProbeMaps are collections of variable and message probes that can be displayed graphically Probes can also be used without the graphical component to construct method calls dynamically at runtime Graphical and non-graphical probes

  19. Dynamic message calling • Probe library allows you to construct method calls dynamically • Here selector and target are data to be determined at runtime theProbe=[MessageProbe createBegin: zone]; [theProbe setProbedSelector: theSelector]; theProbe=[theProbe createEnd]; anIndex=[aCollection begin: zone]; while((aMember=[anIndex next])) { theData=[theProbe doubleDynamicCallOn:aMember]]; [self doSomething: theData]; }

  20. Averager object can probe collection of objects and return average, total, min, max and count One use: Use data as argument to printf() statement to collect statistics Using probes to collect statistics Objectbase Probe EZGraph Entropy Averager EZBin EZ Distribution

  21. Printing out data using Averager • Creating: averager =[Averager createBegin: zone]; [averager setCollection: theCollection]; [averager setProbedSelector: theSelector]; averager=[anAverager createEnd]; • Using: [averager update]; printf(“%4.3f %4.3f %4.3f\n”, [averager getMin], [averager getAverage], [averager getMax]);

  22. Script class reads script file from disk and creates message probes Each line of script defines: access t method arg1 … argN Where access is either method name (get target obj) model (target is model) Creating a script: script=[Script create: self]; [script setFile: "scriptfile"]; [script logEvents: ”logfile"]; [script buildActions: self]; [script activateIn: self]; Sample script: # A comment @begin model 2 printX:Y: 1 2 model 4 printX:Y: 2 4 # Another comment model 8 shockMarketTo: -1 getMarket 20 setAlpha: 70 getMarket 30 setAlpha: 50 @end Scripting with method probes

  23. In ModelSwarm.m: -activateIn: (id) swarmContext { [super activateIn: swarmContext]; script=[Script create: self]; [script setScriptFile: "script.txt"]; [script buildActions: self]; [script activateIn: self]; return self; } -invadeWithAllD: (int) n { int i; id agent,index; if(n > [playerList getCount]) n=[playerList getCount]-1; [self shuffle: playerList]; index=[playerList begin: self]; while(i<n && (agent=[index next])){ [agent setPlayerType: 3]; i++; } return self; } Example: Scripting the IPD

  24. Activate ModelSwarm in ObserverSwarm Example script triggers an invasion of ALL-D at time step 15 and 20 script.txt # Comment @begin model 15 invadeWithAllD: 100 model 20 invadeWithAllD: 200 @end Example:Scripting the IPD (cont) Time step for action The script searches in ModelSwarm for selector

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