[R-br] [OFF] Biblioteca C para matrizes.
Pedro Rafael
pedro.rafael.marinho em gmail.com
Domingo Agosto 12 22:36:16 BRT 2012
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
<pedro.rafael.marinho em gmail.com> 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]
> <ml-node+s2285057n4655843h10 em n4.nabble.com> 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
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>>> >> >>> >>>>>>>>>>>
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>>> >> >>> >>>>>>>>>>> e
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>>> >> >>> >>>>>>>>>>> código mínimo reproduzível.
>>> >> >>> >>>>>>>>>>
>>> >> >>> >>>>>>>>>> _______________________________________________
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>>> >> >>> >>>>>>>>>>
>>> >> >>> >>>>>>>>>>
>>> >> >>> >>>>>>>>>> ________________________________
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>>> >> >>> >>>>>>>>
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>>> >> >>> >>>>>>
>>> >> >>> >>>>>> ________________________________
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>>> >> >>> >>>> ________________________________
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