[R] Frequencies for a list of vectors

[Peter Alspach]

Alternatively, use sapply instead of lapply ....

marieData <- list('30008'=c(1,0,1,0), '60008'=c(0,0,1,0), '90008'=c(0,0,1,0), '100007'=1, '130001'=c(0,1))
marieData
$`30008`
[1] 1 0 1 0

$`60008`
[1] 0 0 1 0

$`90008`
[1] 0 0 1 0

$`100007`
[1] 1

$`130001`
[1] 0 1

table(sapply(marieData, paste, collapse=''))

-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On Behalf Of Rui Barradas
Sent: Wednesday, 6 August 2014 8:49 a.m.
To: Marie-Pierre Sylvestre; r-help at r-project.org
Subject: Re: [R] Frequencies for a list of vectors

Hello,

Maybe something like

table(unlist(lapply(HTNlist, paste, collapse = '')))


(Untested, it's a bad idea not to use ?dput to give a data example.) Use

dput(head(HTNlist))  # paste the output of this in a mail


Hope this helps,

Rui Barradas


Em 05-08-2014 18:39, Marie-Pierre Sylvestre escreveu:
> Dear R users,
>
> I have a list of vectors (list is called HTNlist). Each vector is of 
> length
> 1 to 4 and takes only 0 and 1 as values. E.g.
>
> head(HTNlist)
> $`30008`
> [1] 1 0 1 0
>
> $`60008`
> [1] 0 0 1 0
>
> $`90008`
> [1] 0 0 1 0
>
> $`100007`
> [1] 1
>
> $`130001`
> [1] 0 1
>
> $`130007`
> [1] 1 0 1 0
>
> I would like to obtain a frequency table for the elements of the list. 
> I want to know how many of
> '1 0 0' I have in the list, how many '1 0 1 0' etc.
>
> Can you please help?
>
> Thank you in advance,
> MP
>
> 	[[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at r-project.org mailing list
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> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>

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