Re: Value of a random variable X at Time t

On Fri, Jun 11, 2021 at 3:52 PM umairjamali <[email protected]>
wrote:

> I defined a vector P that contains my probability distribution for a Dice
> Roll, i.e. 6 equal probabilities for each outcome.
>
> Now, I want to define a variable T5 such that P[T5=t] = P{Xt is the first
> random variable with outcome 5}
> In other words: I start my process of tossing a die and T5 is the first
> time
> a 5 is diced.
>
> How would I define it with an expression?
>
> --
> Sent from:
> https://octave.1599824.n4.nabble.com/Octave-General-f1599825.html
>

You can use the rand function
<https://octave.sourceforge.io/octave/function/rand.html> to generate
random numbers, and then scale or round them to be uniform 1 through 6.
P = floor(6*rand(1,N)+1)
Then use find <https://octave.sourceforge.io/octave/function/find.html> to
get the indices of all entries equal to 5:
T = find(P==5)
The first time a 5 is rolled is just the first element of T, i.e. it is
T(1)..