在R中使用Fortran模块? [英] using a Fortran module in R?
问题描述
只要我没有在模块中使用它,我就可以在R中使用Fortran子例程。例如:
<$ c
隐式无
整数,intent(in):: darts
双精度,intent(out):: dartsscore
双精度: :x_coord,y_coord
integer ::得分,n
$ b $得分= 0
做n = 1,飞镖
随机号码(x_coord)
随机号码(y_coord)
如果((x_coord ** 2 + y_coord ** 2)<= 1.0d0)则
得分=得分+ 1
如果
结束(avepi,DARTS,ROUNDS)
dartsscore = 4.0d0 *得分/飞镖
结束子程序dboard
子程序pi隐式无
双精度,意图(out):: avepi
整数,意图(in):: DARTS,ROUNDS
整数:: MASTER,rank,i,n
整数,allocatable :: seed(:)
双精度n :: pi_est,homepi,pirecv,pisum
接口
子程序dboard(飞镖,dartsscore)
隐式无
整数,intent(in):: darts
双精度,意图(out):: dartsscore
结束子程序dboard
结束界面
!我们在连续运行中将其设置为零
等级= 0
!初始化随机数发生器
!我们确保每个任务的种子不同
调用random_seed()
调用random_seed(size = n)
allocate(seed(n))
seed = 12 + rank * 11
调用random_seed(put = seed(1:n))
解除分配(种子)
avepi = 0
do i = 0,ROUNDS-1
打电话dboard(飞镖,pi_est)
!计算pi在所有迭代中的平均值
avepi =((avepi * i)+ pi_est)/(i + 1)
end do
结束子程序pi
$ b可以为R编译:
R CMD SHLIB ./Fortran/Fpi.f90
我可以在R中运行它:
mypi < - function(DARTS,ROUNDS){
dyn.load(./ Fortran / Fpi .so)
retvals < - .Fortran(pi,avepi = as.numeric(1),DARTS = as.integer(DARTS),ROUNDS = as.integer(ROUNDS))
返回(retvals $ avepi)
}
mypi(DARTS = 50000,ROUNDS = 10)
我想在模块中编写我的fortran子例程。我认为这是不可能的,但@roygvib和@francescalus提到它是在我以前的问题
你如何做附加绑定(c,name = ...)@roygvib提到的事情在那篇文章中?
谢谢!
模块Fortranpi
IMPLICIT NONE
包含
子程序dboard(飞镖,dartsscore)
隐式无
整数,意图(in)::飞镖
双精度,意图(out):: dartsscore
双精度:: x_coord,y_coord
integer ::得分,n
得分= 0
做n = 1,飞镖
来电随机号码(x_coord)
来电随机号码(y_coord)$ b $如果((x_coord ** 2 + y_coord ** 2)≤1.0d0)则b
,则
得分=得分+ 1
结束如果
结束做
dartsscore = 4.0d0 *得分/飞镖
结束子程序dboard
子程序pi(avepi,DARTS, ROUNDS)bind(C,name =pi_)
隐式none
双精度,intent(out):: avepi
整型,意图(in):: DARTS,ROUNDS
integer:MASTER,rank,i,n
整数,allocatable :: seed(:)
双精度:: pi_est,homepi,pirecv,pisum
接口
子程序dboard(飞镖,dartsscore)
隐式无
整数,意图(in)::飞镖
双精度,意图(out):: dartsscore
结束子程序dboard
结束界面
!我们在连续运行中将其设置为零
等级= 0
!初始化随机数发生器
!我们确保每个任务的种子不同
调用random_seed()
调用random_seed(size = n)
allocate(seed(n))
seed = 12 + rank * 11
调用random_seed(put = seed(1:n))
解除分配(种子)
avepi = 0
do i = 0,ROUNDS-1
打电话dboard(飞镖,pi_est)
!计算pi在所有迭代中的平均值
avepi =((avepi * i)+ pi_est)/(i + 1)
end do
结束子程序pi
结束模块Fortranpi
当我尝试使用Rstudio构建包时,出现以下错误:
==> R CMD INSTALL --no-multiarch --with-keep.source MyPi
*安装到库'/home/ignacio/R/x86_64-pc-linux-gnu-library/3.2'
make:全部无法完成。
*安装*源*包'MyPi'...
** libs
安装到/home/ignacio/R/x86_64-pc-linux-gnu-library/3.2/MyPi/ libs
** R
**为延迟加载准备软件包
**帮助
***安装帮助索引
**构建软件包索引
* *测试是否可以加载已安装的软件包
library.dynam中的错误(lib,package,package.lib):
共享对象'Fortranpi.so'找不到
错误:加载失败
执行暂停
错误:加载失败
*删除'/home/ignacio/R/x86_64-pc-linux-gnu-library/3.2/MyPi'
*恢复以前的'/ home /ignacio/R/x86_64-pc-linux-gnu-library/3.2/MyPi'
退出状态1.
我相信问题可能是NAMESPACE
useDynLib(Fpi)
exportPattern(^ [[:alpha:]] +)
解决方案感谢@roygvib和@francescalus这是我的工作模块:
模块Fortranpi
IMPLICIT NONE
包含
子程序dboard(飞镖,dartsscore)
整数,意图(in) :: darts
double precision,intent(out):: dartsscore
double precision :: x_coord,y_coord
integer :: score,n
score = 0 $ ((x_coord ** 2 + y_coord ** 2))b $ b do n = 1,darts
call random_number(x_coord)
call random_number(y_coord)
= 1.0d0)然后
得分=得分+ 1
如果
结束
dartsscore = 4.0d0 *得分/飞镖
(c,name =pi_)
use,intrinsic :: iso_c_binding,只有:c_double,c_int
real(c_double),intent(out):: avepi
integer(c_int),intent(in):: DARTS,ROUNDS
integer :: MASTER,rank,i,n
int eger,allocatable :: seed(:)
双精度:: pi_est,homepi,pirecv,pisum
!我们在连续运行中将其设置为零
等级= 0
!初始化随机数发生器
!我们确保每个任务的种子不同
调用random_seed()
调用random_seed(size = n)
allocate(seed(n))
seed = 12 + rank * 11
调用random_seed(put = seed(1:n))
解除分配(种子)
avepi = 0
do i = 0,ROUNDS-1
打电话dboard(飞镖,pi_est)
!计算pi在所有迭代中的平均值
avepi =((avepi * i)+ pi_est)/(i + 1)
end do
结束子程序pi
结束模块Fortranpi
I am able to use a fortran subroutine in R as long as I don't have it inside a module.For example:
subroutine dboard(darts, dartsscore) implicit none integer, intent(in) :: darts double precision, intent(out) :: dartsscore double precision :: x_coord, y_coord integer :: score, n score = 0 do n = 1, darts call random_number(x_coord) call random_number(y_coord) if ((x_coord**2 + y_coord**2) <= 1.0d0) then score = score + 1 end if end do dartsscore = 4.0d0*score/darts end subroutine dboard subroutine pi(avepi, DARTS, ROUNDS) implicit none double precision, intent(out) :: avepi integer, intent(in) :: DARTS, ROUNDS integer :: MASTER, rank, i, n integer, allocatable :: seed(:) double precision :: pi_est, homepi, pirecv, pisum interface subroutine dboard(darts, dartsscore) implicit none integer, intent(in) :: darts double precision, intent(out) :: dartsscore end subroutine dboard end interface ! we set it to zero in the sequential run rank = 0 ! initialize the random number generator ! we make sure the seed is different for each task call random_seed() call random_seed(size = n) allocate(seed(n)) seed = 12 + rank*11 call random_seed(put=seed(1:n)) deallocate(seed) avepi = 0 do i = 0, ROUNDS-1 call dboard(darts, pi_est) ! calculate the average value of pi over all iterations avepi = ((avepi*i) + pi_est)/(i + 1) end do end subroutine pi
Can be compiled for R with:
R CMD SHLIB ./Fortran/Fpi.f90
and I can run it in R with:
mypi <- function(DARTS, ROUNDS) { dyn.load("./Fortran/Fpi.so") retvals <- .Fortran("pi", avepi = as.numeric(1), DARTS = as.integer(DARTS), ROUNDS = as.integer(ROUNDS)) return(retvals$avepi) } mypi(DARTS = 50000, ROUNDS = 10)
I would like to write my fortran subroutines inside a module. I thought this was not possible, but @roygvib and @francescalus mentioned it is in one of my previous questions
How do you do the "attaching bind("c",name=...)" thing that @roygvib mentioned in that post?
Thanks!
I made the changes suggested in the comments:
Module Fortranpi IMPLICIT NONE contains subroutine dboard(darts, dartsscore) implicit none integer, intent(in) :: darts double precision, intent(out) :: dartsscore double precision :: x_coord, y_coord integer :: score, n score = 0 do n = 1, darts call random_number(x_coord) call random_number(y_coord) if ((x_coord**2 + y_coord**2) <= 1.0d0) then score = score + 1 end if end do dartsscore = 4.0d0*score/darts end subroutine dboard subroutine pi(avepi, DARTS, ROUNDS) bind(C, name="pi_") implicit none double precision, intent(out) :: avepi integer, intent(in) :: DARTS, ROUNDS integer :: MASTER, rank, i, n integer, allocatable :: seed(:) double precision :: pi_est, homepi, pirecv, pisum interface subroutine dboard(darts, dartsscore) implicit none integer, intent(in) :: darts double precision, intent(out) :: dartsscore end subroutine dboard end interface ! we set it to zero in the sequential run rank = 0 ! initialize the random number generator ! we make sure the seed is different for each task call random_seed() call random_seed(size = n) allocate(seed(n)) seed = 12 + rank*11 call random_seed(put=seed(1:n)) deallocate(seed) avepi = 0 do i = 0, ROUNDS-1 call dboard(darts, pi_est) ! calculate the average value of pi over all iterations avepi = ((avepi*i) + pi_est)/(i + 1) end do end subroutine pi end module Fortranpi
When I try to build the package with Rstudio I get these errors:
==> R CMD INSTALL --no-multiarch --with-keep.source MyPi * installing to library ‘/home/ignacio/R/x86_64-pc-linux-gnu-library/3.2’ make: Nothing to be done for 'all'. * installing *source* package ‘MyPi’ ... ** libs installing to /home/ignacio/R/x86_64-pc-linux-gnu-library/3.2/MyPi/libs ** R ** preparing package for lazy loading ** help *** installing help indices ** building package indices ** testing if installed package can be loaded Error in library.dynam(lib, package, package.lib) : shared object ‘Fortranpi.so’ not found Error: loading failed Execution halted ERROR: loading failed * removing ‘/home/ignacio/R/x86_64-pc-linux-gnu-library/3.2/MyPi’ * restoring previous ‘/home/ignacio/R/x86_64-pc-linux-gnu-library/3.2/MyPi’ Exited with status 1.
I believe the problem could be the NAMESPACE
useDynLib(Fpi) exportPattern("^[[:alpha:]]+")
解决方案Thanks to @roygvib and @francescalus this is my working module:
Module Fortranpi IMPLICIT NONE contains subroutine dboard(darts, dartsscore) integer, intent(in) :: darts double precision, intent(out) :: dartsscore double precision :: x_coord, y_coord integer :: score, n score = 0 do n = 1, darts call random_number(x_coord) call random_number(y_coord) if ((x_coord**2 + y_coord**2) <= 1.0d0) then score = score + 1 end if end do dartsscore = 4.0d0*score/darts end subroutine dboard subroutine pi(avepi, DARTS, ROUNDS) bind(C, name="pi_") use, intrinsic :: iso_c_binding, only : c_double, c_int real(c_double), intent(out) :: avepi integer(c_int), intent(in) :: DARTS, ROUNDS integer :: MASTER, rank, i, n integer, allocatable :: seed(:) double precision :: pi_est, homepi, pirecv, pisum ! we set it to zero in the sequential run rank = 0 ! initialize the random number generator ! we make sure the seed is different for each task call random_seed() call random_seed(size = n) allocate(seed(n)) seed = 12 + rank*11 call random_seed(put=seed(1:n)) deallocate(seed) avepi = 0 do i = 0, ROUNDS-1 call dboard(darts, pi_est) ! calculate the average value of pi over all iterations avepi = ((avepi*i) + pi_est)/(i + 1) end do end subroutine pi end module Fortranpi
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