Question

Matlab

Answer 1

% Many games require the player to roll two dice. The number on each
% die can vary from 1 to 6.
% (a) Use the rand function in combination with a rounding function
% to create a simulation of one roll of one die.



% (b) Use your results from part (a) to create a simulation of the
% value rolled with a second die.

% (c) Add your two results to create a value representing the total
% rolled during each turn.

% (d) Use your program to determine the values rolled in a favorite
% board game, or use the game shown in Figure P3.20.

Answer 2

@Kainui

Answer 3

Currently watching youtube. I think i am overcomplicating this problem.....

Answer 4

I am more stump on the math portion.

Answer 5

HOW TO DRAW RANDOM INTEGERS FROM {1,2,...,N} BASED ON THE \(\verb+rand()+\) FUNCTION.

Draw the number of numbers you want.
```
randomnumbers = rand(2)
```
Since it's the uniform distribution, use this:
\( X\sim \mathrm{Unif}(0,1) \Rightarrow 6X \sim \mathrm{Unif}(0,6)\).

Therefore, multiply by 6 the randomnumbers:
```
randomnumbers6 = 5 * randomnumbers
```
Use `round` on \(\verb++\).
You should use the \(\verb+ceiling+\) function:
- any value from (0,1] -> 1
- any value from (1,2] -> 2
- any value from (2,3] -> 3
- etc.

After these two operations, you obtained your die-results from rand() numbers.

Answer 6

The MATLAB function is called \(\verb+ceil(...)+\).

Answer 7

Try this: \(\verb+ceil(6* rand(2))+\). What is the result?

Answer 8

ans =

1 5
5 1

Answer 9

why are we using rand(2) though?

Answer 10

why not rand(3 or 4 or 5)

Answer 11

sorry , I thought you needed to compute generate several numbers at the same type.

Try: ceil(6*rand()).

Answer 12

>> ceil(6*rand())

ans =

4

Answer 13

lots of times... you should see it works.. generating numbers from 1 to 6.

Answer 14

@reemii what?

Answer 15

I meant: execute "ceil(6*rand())" many times, it should convince yourself that it gives numbers from 1 to 6.. with a probably uniform distribution

Answer 16

okay I see.

Answer 17

as I'm sure you can see, `rand(2)` will generate a random 2x2 matrix

rand(3) will generate a random 3x3 matrix
rand(4) will generate a random 4x4 matrix
...
...
...
rand(N) will generate a random NxN matrix

since you want a single random number, you want a random 1x1 matrix. Matlab thinks of scalar numbers as a 1x1 matrix. So you can say `rand(1)` or just say `rand()`

to ensure the random result is between 1 and 6, you'll have to do 2 steps

step 1) multiply the result of rand() by 6. This is so you get a result in the targeted range you want. In code, it would look like this `6*rand()`
step 2) Use the ceiling function to ensure you land on a whole number. In code, it looks like this `ceil(6*rand())`

Answer 18

Brb

Answer 19

did you end up solving the problem @raffle_snaffle ? : )

Answer 20

@jtvatsim no I didn't get b or c yet