[R] request: most repeated component of a list

[Adam D. I. Kramer]

That is indeed different from what I thought the first time.

x <- sapply(1:length(l), function(x) {
   sum(sapply(l, function(y) {
     if ( nrow(l[[x]]) != nrow(y) | ncol(l[[x]]) != ncol(y) ) FALSE
     else sum(y != l[[x]]) == 0
   }))
} )

names(x) <- names(l)

Then, x has the same names as l, and x[i] is the number of matches that
l[[i]] has...so you want the index or indices of max(x).

--Adam

On Thu, 11 Sep 2008, Muhammad Azam wrote:

> May be i could not explain properly. Actually there are components of
> list i.e. [[1]] to [[500]]. Each component containing r-rows (may be
> different for each [[ k ]] and c-columns same for all). I have to
> compare all the [[ k ]] components of that list and found the one
> appearing maximum no of times. e.g. from three components [[1]] to
> [[3]] given below. The most repeated is
>
>         [,1] [,2] [,3] [,4] [,5]
> [1,]    4    0    0    0    0
> [2,]    4    3    4    0    0
> [3,]    4    3    4    0    0
> [4,]    4    3    0    0    0Please help to find it. Thanks and
>
> best regards
> Muhammad Azam
>
>
> ----- Original Message ----
> From: jim holtman <jholtman at gmail.com>
> To: Muhammad Azam <mazam72 at yahoo.com>
> Cc: R-help request <r-help-request at r-project.org>; R Help <r-help at r-project.org>
> Sent: Wednesday, September 10, 2008 5:59:28 PM
> Subject: Re: [R] request: most repeated component of a list
>
> If want you want is the summary from all of them, then 'rbind' the
> data together into one matrix and analyze it:
>
> totalMat <- do.call(rbind, listOfMatrices)
>
> On Wed, Sep 10, 2008 at 11:49 AM, Muhammad Azam <mazam72 at yahoo.com> wrote:
>> Dear R community
>>
> I have stored the results of arrays in a list consist of J-components
> (say 200 components). Each component containing same no of columns but
> may be different no of rows. e.g
>> [[1]]
>>     [,1] [,2] [,3] [,4] [,5]
>> [1,]    4    0    0    0    0
>> [2,]    4    3    4    0    0
>> [3,]    4    3    4    0    0
>> [4,]    4    3    0    0    0
>>
>> [[2]]
>>     [,1] [,2] [,3] [,4] [,5]
>> [1,]    4    0    0    0    0
>> [2,]    4    3    4    0    0
>> [3,]    4    3    4    0    0
>> [4,]    4    3    0    0    0
>>
>> [[3]]
>>     [,1] [,2] [,3] [,4] [,5]
>> [1,]    4    0    0    0    0
>> [2,]    4    4    1    0    0
>> [3,]    4    4    1    0    0
>> [4,]    4    4    0    0    0
>> [5,]    4    4    0    0    0
>>
>>
> For 200 components i want to make a frequency table. How can i make a
> frequency table of these components or the most repeated component out
> of all? Any help in this regard will be appreciated.
>>
>>
>> Muhammad Azam
>>
>>
>>
>>        [[alternative HTML version deleted]]
>>
>> ______________________________________________
>> R-help at r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>>
>
>
>
> -- 
> Jim Holtman
> Cincinnati, OH
> +1 513 646 9390
>
> What is the problem that you are trying to solve?
>
>
>
> 	[[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>