[R] discrete variable

[David Winsemius]

"Pete Dorothy" <croero at gmail.com> wrote in
news:fd75eef30803021227n2030d989iaeff1f3502327aba at mail.gmail.com: 

> Hello,
> 
> I am sorry for asking such a basic question. I could not find an
> answer to it using google.
> 
> I have a discrete variable (a vector x) taking for example the
> following values : 0, 3, 4, 3, 15, 5, 6, 5



> 
> Is it possible to know how many different values (modalities) it
> takes ? Here it takes 6 different values but the length of the
> vector is 8. 

Try:

test <- c(0, 3, 4, 3, 15, 5, 6, 5)
length(table(test))
#[1] 6


> I would like to know if there is a way to get the set of the
> modalities {0,3,4,15,5,6} with the number of times each one is taken
> {1,2,1,1,2,1}

table(test)
#test
# 0  3  4  5  6 15 
# 1  2  1  2  1  1 


> 
> Thank you very much
> 
> P.S. : is there some useful functions for discrete variables ?

Yes...

<https://home.comcast.net/~lthompson221/Splusdiscrete2.pdf>

-- 
David Winsemius