Drunk on the way home!

Drunk on the way home!

The drunk is halfway between home and pub, taking every step randomly in one direction. Write a function that will simulate a drunkard's movement. Its parameters will be the distance between home and pub and the number of steps to the drunken asleep (i.e. the maximum length of the simulation). The simulation ends either when the drunk arrives home or the pub, or after the number of steps has been exhausted.

Program format:

function drunkman_simulator(size,steps)

Output format:

>> drunkman_simulator(10, 100)

home . . . . . * . . . . pub

home . . . . * . . . . . pub

home . . . * . . . . . . pub

home . . . . * . . . . . pub

home . . . * . . . . . . pub

home . . . . * . . . . . pub

home . . . * . . . . . . pub

home . . * . . . . . . . pub

home . * . . . . . . . . pub

home . . * . . . . . . . pub

home . . . * . . . . . . pub

home . . * . . . . . . . pub

home . . . * . . . . . . pub

home . . * . . . . . . . pub

home . . . * . . . . . . pub

home . . . . * . . . . . pub

home . . . . . * . . . . pub

home . . . . * . . . . . pub

home . . . . . * . . . . pub

home . . . . * . . . . . pub

home . . . . . * . . . . pub

home . . . . . . * . . . pub

home . . . . . * . . . . pub

home . . . . . . * . . . pub

home . . . . . . . * . . pub

home . . . . . . . . * . pub

home . . . . . . . . . * pub

home . . . . . . . . * . pub

home . . . . . . . . . * pub

home . . . . . . . . . . pub

Arrived pub!

[Image Analyst]

Enver, the result for one run is shown above. He probably doesn't have that particular result anymore since it's random - the result will be different every time he runs it, and there was really no reason to save that particular result.

[Image Analyst]

Well I guess I can post my version since he already did it for his homework. It's attached.

[Abdulaziz Muslem]

Thanks it's the true for me

[Abdulaziz Muslem]

ne hatası tam olarak sizi anlayamdım calışıyorum sanırım son attığı

I guess I can't understand exactly what the error is. I am trying.

[Image Analyst]

Enver, just save the attached test3.m, and run it. It will run. The drunkman_simulator() function is right there, defined in the test3.m file. If you're copying and pasting, then you're not copying and pasting the entire contents of the m-file I attached.

Abdulaziz, what error are you getting with your code? I thought it was running perfectly for you.

[Abdulaziz Muslem]

its running

Beginning to run test3.m ...

0 Home.....*.....Pub

01 Home......*....Pub

02 Home.......*...Pub

03 Home........*..Pub

04 Home.......*...Pub

05 Home........*..Pub

06 Home.........*.Pub

07 Home........*..Pub

08 Home.......*...Pub

09 Home......*....Pub

10 Home.......*...Pub

11 Home......*....Pub

12 Home.......*...Pub

13 Home......*....Pub

14 Home.......*...Pub

15 Home......*....Pub

16 Home.......*...Pub

17 Home........*..Pub

18 Home.........*.Pub

19 Home..........*Pub

Done! Went back inside the pub after 19 steps.

[Abdulaziz Muslem]

but your chenge from drunkman_simulator(10, 30) to drunkman_simulator(10, 100)

[Image Analyst]

Abdulaziz, you can change it to 100 if you want. Almost always it ends before 100 but I just put 30 because I wanted to test a case where it hit the maximum number of steps without running the program dozens and dozens of times, which is what it would take to have it never get to home or pub after 100 steps.

[Ing]

I runned the code but It doesn't work. I couldn't understand why, because I didn't change anything from the atteched m file. It has to be working as I understand.

[Image Analyst]

I just copied and pasted the test3.m I attached and it runs perfectly. I think you must have changed something. Please show your error message and attach the version you actually ran.

Answer 1

[Image Analyst]

OK. I assume it works because you didn't ask a question.

When I did this back in college they also asked us to find the probability distribution function for how far away from the starting point as a function of number of steps. I think it was eye opening for most students that the expected location is not right back at the starting location, especially since you could go +1 or -1 at each step.

For what it's worth, I'm attaching my set of random walk demos, in case anyone is interested in different random walk situations.

[Abdulaziz Muslem]

Thanks