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

13 Ago 2012

      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
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>> >>> >>>>>>>>>>> código mínimo reproduzível.
>> >>> >>>>>>>>>>
>> >>> >>>>>>>>>> _______________________________________________
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>> >>> >>>>>>>>>>
>> >>> >>>>>>>>>>
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