CS 1025 Computational Modeling and Simulation

Test One Study Guide - Spring 2013 - Monday, March 11th

1. Scanned in Handouts and old test/quiz pages:

   PDF of questions on NetLOGO GAME of LIFE model...

2. Another set of practice data for the SHODOR data flyer application....

        x              y
   -----------     -----------
   20.44712727     20.51518572
   16.71315584     15.42506731
   17.99293085     16.15964686
   23.362533       22.79563739
   24.9267934      22.01796826
   18.55425506     18.20021532
   23.79604137     21.90370105
   19.86663545     17.55227197
   19.1290307      19.0699128
   21.91487095     22.91732607
   
       y = mx + b or in Data Flyer  f(x) = m * x + b
   
       What is m?   _________________       What is b?   _________________
   
       What is the Sum of squares of deviations that you found?
   

3. In NetLogo, show what the output would look like for the following:

What is the output you would see on the NetLogo grid 
after running the ExampleOne procedure?   
   (Draw a rough picture of about what it would look like). 
         
 TO ExampleOne
     ca
     cro 8
     
     ask turtles [    
         fd 5
    
         pd 
         fd 5
   
         pu
         fd 2
     
         pd
         fd 2
    
         pu 
         fd 2
     ]
 END     

4. Same question as above. Show the output of ExampleTwo procedure.

Show what the screen or the NetLogo grid would probably look like AFTER the following procedure ExampleTwo finishes.
           (Note: there may be many possible drawings that get full credit for this
                  question.   You will NOT be told this on the exam, but you are being
                  told this for this study guide).  CRO versus CRT - VIP to know!
TO ExampleTwo
    CA
    CRT 8
    
    ask turtles 
    [
        PD
        FD 8
    ]   
END

5. With regard to the world of NetLogo, what is a TORUS setting for the grid of patches? Looking at some output, be able to describe whether the world was a TORUS, or wrapped just horizontally, or if it wrapped just vertically. Recall in class how a sheet of paper could demonstrate a grid world wrapping vertically OR wrapping horizontally, but its hard to show it doing both..

6. What does the following NetLogo code produce as output?

   to randomColorPatches
      
      ask patches
         [
            ifelse random  100 < 30 
                [ set pcolor green ]    ;  Note: you might be asked to show the output of a NetLogo procedure that 
                [ set pcolor white ]    ;        included an ifelse, so be sure to understand how ifelse is used in this example!
         ]
   end
      

7. Show the output (generally what it would look like). This question tests one of your old assignment questions, the one where the EVEN and the ODD turtles did different things .

   SHOW THE OUTPUT, roughly what it would look like when stagger is done.

to stagger
    ca
    cro 8
    ask turtles [ifelse remainder who 2 = 0  [ fd 5  wait 0.2] 
                                             [ fd 10 wait 0.2] ]
end

8. SHOW THE OUTPUT, roughly what it would look like when stagger3 is done.

   Just draw a picture of what the NetLogo window would look like after execution of stagger3 is done.

   Copy and Paste the NetLogo code into your NetLogo if you want to see what the output looks like and verify you figured it out.

to stagger3
   ca
   cro 15
   ask turtles 
       [ ifelse remainder who 3 = 0      

              [ fd 5 wait 0.1]                ; the remainder was 0

              [ ifelse remainder who 3 = 1    ; remainder was NOT 0
                              
                      [fd 10 wait 0.1]    ; the remainder was = 1
                             
                      [fd 15 wait 0.1]    ; the remainder was = 2 
              ]
       ]
end                        

9. FLASH: Study Page for Flash bouncing ball model.

   See the application with the two bouncing balls. RED uses Ease In and Ease Out to be a better model and simulation. GREEN does NOT use any easing in or easing out. Green Ball moves at a constant speed.

   For the SHODOR Data Flyer application: Ease In, Ease Out, No Easing frame by frame locations of the ball moving from y = 20 to y = 380 over 10 frames.

10. See week07F2012.html: LIFE model, Cellular Automata (CAs), ShoDor DATA FLYER tool, Flash models of bouncing balls (with and without Ease In and Ease Out).

    Example: The Flash bouncing ball with Ease In and Ease Out and without Ease In and Ease Out (not easing). What does the graph look like for EASE IN? For EASE OUT?

11. The GAME OF LIFE NetLOGO model.