[R] To transform an adjacency matrix

[Arnaud Michel]

Thank you Pascal
Its fine
Michel
Le 20/11/2013 11:55, Pascal Oettli a écrit :
> Hello,
>
> One approach is:
>
> m <- structure(c(0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 1, 0,
> 0, 0, 1, 0, 0, 0, 0), .Dim = c(5L, 5L))
> out <- which(m==1, arr.ind=TRUE)
> out[order(out[,1]),]
>
> Regards,
> Pascal
>
> On 20 November 2013 19:28, Arnaud Michel <michel.arnaud at cirad.fr> wrote:
>> Hi
>> I have the following problem
>> I would like to build, from a matrix filled with 0 and with 1, a matrix
>> or a data.frame which contains, in every line, the number of the line
>> and the number of the column of the matrix for which the value is equal
>> to 1.
>> Exemple :
>>
>> dput(m)
>> structure(c(0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 1,
>> 0, 0, 0, 1, 0, 0, 0, 0), .Dim = c(5L, 5L))
>>
>> Result
>>
>> 1 5
>> 2 3
>> 2 4
>> 4 1
>> 4 3
>>
>> Thank you for your help
>>
>> --
>> Michel ARNAUD
>> Chargé de mission auprès du DRH
>> DGDRD-Drh - TA 174/04
>> Av Agropolis 34398 Montpellier cedex 5
>> tel : 04.67.61.75.38
>> fax : 04.67.61.57.87
>> port: 06.47.43.55.31
>>
>>
>>          [[alternative HTML version deleted]]
>>
>>
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>> and provide commented, minimal, self-contained, reproducible code.
>>
>
>

-- 
Michel ARNAUD
Chargé de mission auprès du DRH
DGDRD-Drh - TA 174/04
Av Agropolis 34398 Montpellier cedex 5
tel : 04.67.61.75.38
fax : 04.67.61.57.87
port: 06.47.43.55.31