[R] Finding combination of states

[Ebert,Timothy Aaron]

Does this work for you?

t0<-t1<-t2<-LETTERS[1:5]
al2<-expand.grid(t0, t1, t2)
al3<-paste(al2$Var1, al2$Var2, al2$Var3)
al4 <- gsub(" ", "", al3)
head(al3)

Tim

-----Original Message-----
From: R-help <r-help-bounces using r-project.org> On Behalf Of Eric Berger
Sent: Monday, September 4, 2023 10:17 AM
To: Christofer Bogaso <bogaso.christofer using gmail.com>
Cc: r-help <r-help using r-project.org>
Subject: Re: [R] Finding combination of states

[External Email]

The function purrr::cross() can help you with this. For example:

f <- function(states, nsteps, first, last) {
   paste(first, unlist(lapply(purrr::cross(rep(list(v),nsteps-2)),
\(x) paste(unlist(x), collapse=""))), last, sep="") } f(LETTERS[1:5], 3, "B", "E") [1] "BAE" "BBE" "BCE" "BDE" "BEE"

HTH,
Eric


On Mon, Sep 4, 2023 at 3:42 PM Christofer Bogaso <bogaso.christofer using gmail.com> wrote:
>
> Let say I have 3 time points.as T0, T1, and T2.(number of such time
> points can be arbitrary) In each time point, an object can be any of 5
> states, A, B, C, D, E (number of such states can be arbitrary)
>
> I need to find all possible ways, how that object starting with state
> B (say) at time T0, can be on state E (example) in time T2
>
> For example one possibility is BAE etc.
>
> Is there any function available with R, that can give me a vector of
> such possibilities for arbitrary number of states, time, and for a
> given initial and final (desired) states?
>
> ANy pointer will be very appreciated.
>
> Thanks for your time.
>
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