Simulating the rolling of a dice

[ef99]

I want to create a program that simulates the rolling of one dice. Does this code work to simulate that effect?

[REFNH]

Hello,

Yes it'll work very well. The result will be a number between 1..6

[Jacobson-ni]

What will happen when the random number primitive generates a very small number, say 0.05?

[REFNH]

Yess the example will have as result 0  sorry i have not pay attention. But we can change the code as shown in the figures:

[johntrich1971]

No, it will not work. As was hinted by Jacobson it will generate a number between 0 and 6, not the desired 1 and 6. Change your rounding to Round toward + infinity and it will work.

Edited to add: 

Your last post came while I was typing. I believe that your second approach will be biased such that 6 will be half as likely as 2 - 5 and you will be 50% more likely to have a value of 1.

[Jacobson-ni]

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@REFNH wrote:

Yess the example will have as result 0  sorry i have not pay attention. But we can change the code as shown in the figures:

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As mentioned below, round to + infinity is what you really want to do. Your strategy will only generate numbers 1..6 but if you plot the distribution of the outputs you will see an issue. In your example, 1 will appear if RAND*6 is between 0 and 1.5 while 6 will only appear if RAND*6 is between 5.5 and 6.0

[REFNH]

if we want that the probability is the same for all the numbers we can use a while loop 

[RTSLVU]

Here's how I simulated rolling a die with animation

[crossrulz]

If you are using LabVIEW 2019, just use the Random Number (Range).vi.

EDIT: You will want to use the U64 or I64 version, not the DBL.

[johntrich1971]

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@RTSLVU wrote:

Here's how I simulated rolling a die with animation

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I've not yet installed LV2019 but I believe that your die is biased. Both 1 and 6 will be half as likely as any other number (You'll only get 1 for values of 1 to 1.49, 2 for values of 1.5 to 2.49, . . . , 6 for values of 5.5 to 6).