Re: [R-br] [OFF] Biblioteca C para matrizes.

13 Ago 2012

      eh algum config...

Sent from a mobile device
On Aug 13, 2012 7:17 PM, "Pedro Rafael" <pedro.rafael.marinho@gmail.com>
wrote:
...
Vou tentar procurar qual o arquivo que devo fazer essa alteração que
você me informou.
Obrigado.
[   ],
Pedro Rafael Diniz Marinho.
Em 13 de agosto de 2012 05:53, beniltoncarvalho [via R-br]
<ml-node+s2285057n4655847h34@n4.nabble.com> escreveu:
...
mais provavel vc nao ter habilitado LAPACK/BLAS durante a compilacao
do Armadillo... ja' nao lembro exatamente o arquivo, mas ha' um q vc
precisa modificar manualmente (caso esteja fazendo a instalacao
manual) e deixar algo como
define ARMA_USE_LAPACK
define ARMA_USE_BLAS
b
2012/8/13 Pedro Rafael <[hidden email]>:
...
Será que é alguma coisa com o sistema operacional?
[   ],
Pedro Rafael Diniz Marinho.
Em 12 de agosto de 2012 22:36, Pedro Rafael
<[hidden email]> escreveu:
...
Tentei remover a biblioteca armadillo e instalar as dependências
necessárias e no final reinstalei.
[   ],
Pedro Rafael Diniz Marinho.
Em 12 de agosto de 2012 22:34, Pedro Rafael
<[hidden email]> escreveu:
...
Valeu Benilton. O problema da compilação n ocorre. Possivelmente as
bibliotecas necessárias estão instaladas. Ocorre erro na hora de
executar o programa. O erro é:
error: det(): use of ATLAS or LAPACK needs to be enabled
terminate called after throwing an instance of 'std::logic_error'
  what():
Abortado (imagem do núcleo gravada)
[   ],
Pedro Rafael Diniz Marinho.
Em 12 de agosto de 2012 22:29, beniltoncarvalho [via R-br]
<[hidden email]> escreveu:
...
auto correct fail
-llapack -lblas
Sent from a mobile device
On Aug 13, 2012 2:11 AM, "Pedro Rafael" <[hidden email]> wrote:
>
> Olá Benilton, como vai? O programa que estou testando é bem simples.
> Na verdade a matriz é pequena, 5 por 5. Veja:
>
> #include<iostream>
> #include"armadillo"
>
> using namespace arma;
>
> int main()
> {
> mat    A = randu<mat>(5,5);
> double x = det(A);
> return 0;
> }
>
> Compilei como você me indicou e obtive o seguinte erro.
>
> /usr/include/armadillo_bits/compiler_setup.hpp:117:6: warning:
> #warning "*** Detected GCC 4.7.0 / 4.7.1, which has a regression
> (bug)" [-Wcpp]
> /usr/include/armadillo_bits/compiler_setup.hpp:118:6: warning:
> #warning "*** See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53549
> " [-Wcpp]
> /usr/include/armadillo_bits/compiler_setup.hpp:119:6: warning:
> #warning "*** A partial workaround for the bug has been activated,
> " [-Wcpp]
> /usr/include/armadillo_bits/compiler_setup.hpp:120:6: warning:
> #warning "*** which reduces some functionality in fixed-size
matrices
> " [-Wcpp]
> /usr/bin/ld: cannot find -lapack
> collect2: error: ld returned 1 exit status
>
>
> [   ],
> Pedro Rafael Diniz Marinho.
> Em 12 de agosto de 2012 22:06, beniltoncarvalho [via R-br]
> <[hidden email]> escreveu:
>
> > Vc precisa linkar p lapack blas
> >
> > g++ -O2 -lapack -lblas programa.cpp
> >
> > Obvio, não testado. Adicionalmente, p matriz grande vc deveria
usar
> > log_det.
> >
> > Sent from a mobile device
> >
> > On Aug 13, 2012 12:44 AM, "Pedro Rafael" <[hidden email]> wrote:
> >>
> >> Pessoal estou tendo um problema com  a biblioteca armadillo no
> >> linux
> >> fedora. Quando vou calcular o determinante de uma matriz muito
> >> pequena
> >> funciona mas quando a minha matriz é grande ocorre o seguinte
erro:
> >>
> >> error: det(): use of ATLAS or LAPACK needs to be enabled
> >>
> >> Já instalei as bibliotecas  cmake, blas-devel, lapack-devel,
> >> atlas-devel, boost-devel mas o erro permanece. Alguém já teve
isso
> >> ou
> >> poderia dar uma dica de como corrigir esse problema?
> >>
> >> Obrigado,
> >> Pedro Rafael Diniz Marinho.
> >>
> >>
> >> Em 10 de agosto de 2012 23:58, Pedro Rafael
> >> <[hidden email]> escreveu:
> >>
> >> > Não compreendi os exemplos. Vou dar uma lida maior e buscar
mais
> >> > coisas
> >> > na net.
> >> >
> >> > Obrigado,
> >> > Pedro Rafael Diniz Marinho.
> >> >
> >> >
> >> > Em 10 de agosto de 2012 23:04, beniltoncarvalho [via R-br]
> >> > <[hidden email]> escreveu:
> >>
> >> >> No básico do basico... Envolva sua função em um extern. Dai
use
> >> >> o
> >> >> .Call
> >> >>
> >> >> Sent from a mobile device
> >> >>
> >> >> On Aug 11, 2012 2:42 AM, "Pedro Rafael" <[hidden email]>
wrote:
> >> >>>
> >> >>> Interessante. Com o comando RcppArmadillo.package.skeleton é
> >> >>> possível
> >> >>> criar a estrutura de diretórios de um pacote R. Digamos que
eu
> >> >>> tenha
> >> >>> um código C++ e queria arrumar ele para fazer um pacote para
o
> >> >>> R.
> >> >>> Eu
> >> >>> queria entender como se da essa comunicação. Só a filosofia
> >> >>> mesmo.
> >> >>> Eu
> >> >>> entendo como criar um pacote do R utilizando o sistema de
> >> >>> orientação à
> >> >>> objeto S3 e sei que existe outras como S4 e R5. O que não
> >> >>> consigo
> >> >>> entender bem é como comunicar o código C/C++ com o R e como
se
> >> >>> dá a
> >> >>> comunicação desses códigos (C/C++) com o R. Vi que posso
chamar
> >> >>> códigos do R para o C++ mas acho que o mais interessante é o
> >> >>> contrário. Como chamar um código otimizado de C++ para R e
> >> >>> criar
> >> >>> um
> >> >>> pacote caso seja conveniente. Alguém poderia me dar um
exemplo
> >> >>> com
> >> >>> uma
> >> >>> função bem simplória só para entender por alto como funciona?
> >> >>>
> >> >>> Obrigado,
> >> >>> Pedro Rafael Diniz Marinho.
> >> >>>
> >> >>>
> >> >>> Em 10 de agosto de 2012 22:23, beniltoncarvalho [via R-br]
> >> >>> <[hidden email]> escreveu:
> >> >>>
> >> >>> > Sim. Mas antes de qualquer coisa, veja o pacote
RcppArmadillo
> >> >>> > e
> >> >>> > os
> >> >>> > documentos de ajuda associados. b
> >> >>> >
> >> >>> > 2012/8/11 Pedro Rafael <[hidden email]>:
> >> >>> >
> >> >>> >> Uma última dúvida. É fácil integrar códigos C++ com o R?
> >> >>> >> Utilizei
> >> >>> >> as
> >> >>> >> funções .C() e .Call() para chamar comandos em C para R.
> >> >>> >> Nunca
> >> >>> >> tentei
> >> >>> >> utilizando C++. A construção de pacotes R feitos
utilizando
> >> >>> >> funções
> >> >>> >> escritas em C++ também é tranquila?
> >> >>> >>
> >> >>> >>
> >> >>> >> Obrigado,
> >> >>> >> Pedro Rafael Diniz Marinho.
> >> >>> >>
> >> >>> >>
> >> >>> >> Em 10 de agosto de 2012 22:04, Pedro Rafael
> >> >>> >> <[hidden email]> escreveu:
> >> >>> >>> Que legal Benilton, vou olhar bem esse pacote. Muito
> >> >>> >>> obrigado
> >> >>> >>> pelas
> >> >>> >>> informações. Vou brincar um pouco com esse pacote.
> >> >>> >>> Procurei na
> >> >>> >>> web
> >> >>> >>> outros pacotes de álgebra linear para C++ mas me parece
que
> >> >>> >>> esse é
> >> >>> >>> o
> >> >>> >>> pacote livre mais completo.
> >> >>> >>> [   ],
> >> >>> >>> Pedro Rafael Diniz Marinho.
> >> >>> >>>
> >> >>> >>>
> >> >>> >>> Em 10 de agosto de 2012 21:31, beniltoncarvalho [via
R-br]
> >> >>> >>> <[hidden email]> escreveu:
> >> >>> >>>> Se vc gostou do Armadillo, divirta-se com o pacote
> >> >>> >>>> RcppArmadillo.
> >> >>> >>>> b
> >> >>> >>>>
> >> >>> >>>> 2012/8/11 Pedro Rafael <[hidden email]>:
> >> >>> >>>>
> >> >>> >>>>> Obrigado Prof. Paulo pela informação, me ajudou
bastante.
> >> >>> >>>>> Eu
> >> >>> >>>>> gostei
> >> >>> >>>>> muito Benilton da biblioteca de álgebra linear
> >> >>> >>>>> "armadillo".
> >> >>> >>>>> Muito
> >> >>> >>>>> mais
> >> >>> >>>>> fácil que a GSL. Eu acho desorganizado os códigos C. O
> >> >>> >>>>> problema
> >> >>> >>>>> que
> >> >>> >>>>> quando escrevo algum código matemático em C++ sempre
tem
> >> >>> >>>>> uma
> >> >>> >>>>> estrutura
> >> >>> >>>>> procedural, deve ser o vício que tenho do C. Acabo
usando
> >> >>> >>>>> quase
> >> >>> >>>>> nada
> >> >>> >>>>> de Classes, Heranças, Polimorfismo, etc. Contudo, acho
> >> >>> >>>>> interessante
> >> >>> >>>>> a
> >> >>> >>>>> facilidade de se trabalhar com vetores, matrizes e
> >> >>> >>>>> alocação
> >> >>> >>>>> dinâmica
> >> >>> >>>>> utilizando C++.
> >> >>> >>>>> [   ],
> >> >>> >>>>> Pedro Rafael Diniz Marinho.
> >> >>> >>>>>
> >> >>> >>>>>
> >> >>> >>>>> Em 10 de agosto de 2012 20:28, beniltoncarvalho [via
> >> >>> >>>>> R-br]
> >> >>> >>>>> <[hidden email]> escreveu:
> >> >>> >>>>>> Pedro,
> >> >>> >>>>>>
> >> >>> >>>>>> Há muito deixei de procurar 'a linguagem mais
<escolha o
> >> >>> >>>>>> adjetivo>
> >> >>> >>>>>> para <escolha a tarefa>'. Fico contente em usar
qualquer
> >> >>> >>>>>> linguagem
> >> >>> >>>>>> que
> >> >>> >>>>>> se mostre util e nao me force a reinventar a roda.
Dito
> >> >>> >>>>>> isso,
> >> >>> >>>>>> nao
> >> >>> >>>>>> vejo
> >> >>> >>>>>> la essas diferencas entre C ou C++. E' obvio que algum
> >> >>> >>>>>> especialista
> >> >>> >>>>>> em
> >> >>> >>>>>> alguma delas encontrara' inumeros casos que servem de
> >> >>> >>>>>> contra-exemplo;
> >> >>> >>>>>> mas enqto ele faz isso, eu sigo adiante resolvendo
> >> >>> >>>>>> outros
> >> >>> >>>>>> problemas.
> >> >>> >>>>>>
> >> >>> >>>>>> b
> >> >>> >>>>>>
> >> >>> >>>>>> 2012/8/10 Paulo Justiniano <[hidden email]>:
> >> >>> >>>>>>
> >> >>> >>>>>>> Pedro
> >> >>> >>>>>>>
> >> >>> >>>>>>> quando se diz em evitar inverter matrizes é porque
> >> >>> >>>>>>> muitas
> >> >>> >>>>>>> contas
> >> >>> >>>>>>> podem
> >> >>> >>>>>>> ser
> >> >>> >>>>>>> feitas sem a inversao explícita
> >> >>> >>>>>>>
> >> >>> >>>>>>> Por exemplo, a conta
> >> >>> >>>>>>>
> >> >>> >>>>>>> X'V^{-1}X
> >> >>> >>>>>>>
> >> >>> >>>>>>> pode ser feita evitando inversao a partir da cholesky
> >> >>> >>>>>>> de V
> >> >>> >>>>>>> que pode ser aproveitada de calculos anteriores uma
vez
> >> >>> >>>>>>> que
> >> >>> >>>>>>> já
> >> >>> >>>>>>> deve
> >> >>> >>>>>>> ter
> >> >>> >>>>>>> sido
> >> >>> >>>>>>> calculada antes para obter as estimativas
> >> >>> >>>>>>>
> >> >>> >>>>>>> No exemplo
> >> >>> >>>>>>>
> >> >>> >>>>>>> cV <- chol(V)
> >> >>> >>>>>>> crossprod(backsolve(cV, X, transpose=T))
> >> >>> >>>>>>>
> >> >>> >>>>>>> isto é ***muito*** mais rapido (compare com
> >> >>> >>>>>>> system.time())
> >> >>> >>>>>>> do que
> >> >>> >>>>>>>
> >> >>> >>>>>>> t(X) %*% solve(V) %*% X
> >> >>> >>>>>>>
> >> >>> >>>>>>>
> >> >>> >>>>>>>
> >> >>> >>>>>>>
> >> >>> >>>>>>> On Thu, 9 Aug 2012, Pedro Rafael wrote:
> >> >>> >>>>>>>
> >> >>> >>>>>>>> Com respeito a evitar de trabalhar com inversas de
> >> >>> >>>>>>>> matrizes é
> >> >>> >>>>>>>> fato
> >> >>> >>>>>>>> mas
> >> >>> >>>>>>>> infelizmente tenho que trabalhar. Para trabalhar com
> >> >>> >>>>>>>> modelos
> >> >>> >>>>>>>> de
> >> >>> >>>>>>>> regressão heterocedásticos vou precisar de cálculo
de
> >> >>> >>>>>>>> inversas de
> >> >>> >>>>>>>> matrizes para o cálculo da estrutura de covariância
de
> >> >>> >>>>>>>> tal
> >> >>> >>>>>>>> estimador.
> >> >>> >>>>>>>> [   ],
> >> >>> >>>>>>>> Pedro Rafael Diniz Marinho.
> >> >>> >>>>>>>>
> >> >>> >>>>>>>>
> >> >>> >>>>>>>> Em 9 de agosto de 2012 17:02, Pedro Rafael
> >> >>> >>>>>>>> <[hidden email]> escreveu:
> >> >>> >>>>>>>>>
> >> >>> >>>>>>>>> Verdade Benilton inverter matrizes requer um custo
> >> >>> >>>>>>>>> computacional
> >> >>> >>>>>>>>> bastante elevado. Atualmente programo em C e
> >> >>> >>>>>>>>> programei
> >> >>> >>>>>>>>> muito
> >> >>> >>>>>>>>> pouco
> >> >>> >>>>>>>>> em
> >> >>> >>>>>>>>> C++ por curiosidade. Você acreditar que códigos em
> >> >>> >>>>>>>>> C++
> >> >>> >>>>>>>>> perdem
> >> >>> >>>>>>>>> muito
> >> >>> >>>>>>>>> desempenho em comparação à C considerando que a
> >> >>> >>>>>>>>> programação
> >> >>> >>>>>>>>> em
> >> >>> >>>>>>>>> ambas
> >> >>> >>>>>>>>> as linguagens sejam eficientes? Você tem boas
> >> >>> >>>>>>>>> experiências
> >> >>> >>>>>>>>> na
> >> >>> >>>>>>>>> utilização de C++ para programação estatística e
para
> >> >>> >>>>>>>>> uso
> >> >>> >>>>>>>>> em
> >> >>> >>>>>>>>> simulações?
> >> >>> >>>>>>>>>
> >> >>> >>>>>>>>> Gostei bastante dessa biblioteca que você me
passou,
> >> >>> >>>>>>>>> muito
> >> >>> >>>>>>>>> interessante. Não conhecia. A única biblioteca para
> >> >>> >>>>>>>>> álgebra
> >> >>> >>>>>>>>> linear
> >> >>> >>>>>>>>> livre que eu conhecia era a GSL.
> >> >>> >>>>>>>>>
> >> >>> >>>>>>>>> [   ],
> >> >>> >>>>>>>>> Pedro Rafael Diniz Marinho.
> >> >>> >>>>>>>>>
> >> >>> >>>>>>>>>
> >> >>> >>>>>>>>> Em 9 de agosto de 2012 15:58, beniltoncarvalho [via
> >> >>> >>>>>>>>> R-br]
> >> >>> >>>>>>>>> <[hidden email]> escreveu:
> >> >>> >>>>>>>>>>
> >> >>> >>>>>>>>>> Eu ainda sou do time "se vc esta' invertendo
matriz,
> >> >>> >>>>>>>>>> entao
> >> >>> >>>>>>>>>> vc
> >> >>> >>>>>>>>>> esta'
> >> >>> >>>>>>>>>> fazendo algo errado"...
> >> >>> >>>>>>>>>>
> >> >>> >>>>>>>>>> Em C++, vc vai querer olhar o que Armadillo tem a
> >> >>> >>>>>>>>>> oferecer.
> >> >>> >>>>>>>>>>
> >> >>> >>>>>>>>>> b
> >> >>> >>>>>>>>>>
> >> >>> >>>>>>>>>> 2012/8/9 Pedro Rafael <[hidden email]>:
> >> >>> >>>>>>>>>>
> >> >>> >>>>>>>>>>> Pessoal gostaria de saber qual uma boa biblioteca
> >> >>> >>>>>>>>>>> livre
> >> >>> >>>>>>>>>>> de
> >> >>> >>>>>>>>>>> C
> >> >>> >>>>>>>>>>> para
> >> >>> >>>>>>>>>>> trabalhar com operações matriciais como inversas
e
> >> >>> >>>>>>>>>>> produtos de
> >> >>> >>>>>>>>>>> matrizes. Qualquer dica será interessante.
> >> >>> >>>>>>>>>>>
> >> >>> >>>>>>>>>>> [ ] Pedro Rafael Diniz Marinho.
> >> >>> >>>>>>>>>>> _______________________________________________
> >> >>> >>>>>>>>>>> R-br mailing list
> >> >>> >>>>>>>>>>> [hidden email]
> >> >>> >>>>>>>>>>>
> >> >>> >>>>>>>>>>>
> >> >>> >>>>>>>>>>>
https://listas.inf.ufpr.br/cgi-bin/mailman/listinfo/r-br
> >> >>> >>>>>>>>>>> Leia o guia de postagem
> >> >>> >>>>>>>>>>> (http://www.leg.ufpr.br/r-br-guia)
> >> >>> >>>>>>>>>>> e
> >> >>> >>>>>>>>>>> forneça
> >> >>> >>>>>>>>>>> código mínimo reproduzível.
> >> >>> >>>>>>>>>>
> >> >>> >>>>>>>>>> _______________________________________________
> >> >>> >>>>>>>>>> R-br mailing list
> >> >>> >>>>>>>>>> [hidden email]
> >> >>> >>>>>>>>>>
> >> >>> >>>>>>>>>>
https://listas.inf.ufpr.br/cgi-bin/mailman/listinfo/r-br
> >> >>> >>>>>>>>>> Leia o guia de postagem
> >> >>> >>>>>>>>>> (http://www.leg.ufpr.br/r-br-guia)
> >> >>> >>>>>>>>>> e
> >> >>> >>>>>>>>>> forneça
> >> >>> >>>>>>>>>> código
> >> >>> >>>>>>>>>> mínimo reproduzível.
> >> >>> >>>>>>>>>>
> >> >>> >>>>>>>>>>
> >> >>> >>>>>>>>>> ________________________________
> >> >>> >>>>>>>>>> If you reply to this email, your message will be
> >> >>> >>>>>>>>>> added
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> >> >>> >>>>>>>>>> discussion
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> >> >>> >>>>>>>>>>
> >> >>> >>>>>>>>>>
> >> >>> >>>>>>>>>>
> >> >>> >>>>>>>>>>
> >> >>> >>>>>>>>>>
> >> >>> >>>>>>>>>>
> >> >>> >>>>>>>>>>
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> >> >>> >>>>>>>>>> NAML
> >> >>> >>>>>>>>
> >> >>> >>>>>>>> _______________________________________________
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> >> >>> >>>>>>>>
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> >> >>> >>>>>>>> e
> >> >>> >>>>>>>> forneça
> >> >>> >>>>>>>> código mínimo reproduzível.
> >> >>> >>>>>>>
> >> >>> >>>>>>>
> >> >>> >>>>>>> _______________________________________________
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> >> >>> >>>>>>>
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> >> >>> >>>>>>> Leia o guia de postagem
> >> >>> >>>>>>> (http://www.leg.ufpr.br/r-br-guia)
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> >> >>> >>>>>>> forneça
> >> >>> >>>>>>> código
> >> >>> >>>>>>> mínimo reproduzível.
> >> >>> >>>>>> _______________________________________________
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> >> >>> >>>>>>
> >> >>> >>>>>>
> >> >>> >>>>>> ________________________________
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> >> >>> > ________________________________
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Re: [R-br] [OFF] Biblioteca C para matrizes.

Benilton Carvalho