[R] subscripting a one column matrix drops dimension

[moacir at supagro.inra.fr]

Thank you all.

It's not easy to find the right keywords to search for
some things. My problem was related to the cclust
package, and I still think that the cclust code will
not work for unidimensional data. I will fix the
my copy of the cclust code according to your suggestion.

Moacir Pedroso Jr.
Embrapa - Empresa Brasileira de Pesquisa Agropecuária
(on leave at INRA - Instutute National de la Recherche Agronomique)







Quoting Jeff Ryan <jeff.a.ryan at gmail.com>:

>
> This is expected behavior:
>
> ?'['
> Usage:
>
>     x[i]
>     x[i, j, ... , drop = TRUE]
>
> drop: For matrices and arrays.  If 'TRUE' the result is coerced to
>          the lowest possible dimension (see the examples).  This only
>          works for extracting elements, not for the replacement.  See
>          'drop' for further details.
>
> try cov(x[sub, drop=FALSE])
>
> HTH
> Jeff
>
>
>
> Pedroso MOACIR wrote:
>>
>> Hi all,
>>
>> Well, I just sent a help msg to the list with this subject,
>> but I think I figured out a way to solve my problem
>> (although I still have no clue if the behavior I described
>> is correct).
>>
>> What I did was to replace occurrences of (for example)
>>
>>                 cov(x[sub, ])
>>
>> with
>>
>>                 cov(matrix(x[sub, ], ncol=ncol(x))
>>
>> It works.
>>
>> I updated my source version of the cclust package. It
>> may be of interest to somebody else, but I don't know
>> how to submit to the package mantainer.
>>
>> Thank you.
>>
>> Moacir Pedroso Jr.
>> Embrapa - Empresa Brasileira de Pesquisa Agropecuária
>> (on leave at INRA - Instutute National de la Recherche Agronomique)
>>
>> ______________________________________________
>> 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.
>>
>>
>
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>
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> and provide commented, minimal, self-contained, reproducible code.
>