循环使用变量文件名 [英] Looping over variable file names

问题描述

我使用Fortran来对大量数据集进行计算，这些数据集被分成许多文件。这些文件的名称是：

  maltoLyo12per-reimage-set1.traj 
 maltoLyo12per-reimage-set2.traj 
 maltoLyo12per-reimage-set3.traj 
  

我写的计算代码如下：

  fileLoop：do j = 31，34 
 
 OPEN（unit = 31，status ='旧的'，file = fileplace //'maltoLyo12per-reimage-set2.traj'）
 OPEN（unit = 32，status ='old'，file = fileplace //'maltoLyo12per-reimage-set2.traj'）
 OPEN（单元= 34，status ='old'，file = fileplace /文件位置/'old'，file = fileplace //'maltoLyo12per-reimage-set3.traj' （'）
 
 ...操作....  

在运行期间，我希望代码一次打开每个文件并在完成计算后关闭它们。但是，上面的代码会一次打开所有文件，并在计算完毕后一次性关闭它们。

所以我试着修改下面的代码：

  fileLoop：do j = 31，34 
 
 OPEN（unit = j，status ='old'，file = fileplace //'maltoLyo12per-reimage-set1.traj'）
 
 close（j）
 end fileLoop 
  

但是在这里我遇到了文件名的问题。每次循环运行时，文件名都不会因文件名中的短语set1而改变。我希望文件名中的数字像set1，set2，set3等那样改变，随后使用文件单元号31,32,33,34等。

解决方案

类似这样的：（编辑为单元号31至34，文件名1至4）。 c $ c> character（len = 90）:: filename

fileLoop：do j = 31，34

write（filename，'（maltoLyo12per-reimage-set ，I1，.traj）'）j - 30
OPEN（单位= j，status ='old'，file =文件名）

关闭（j）
结束做fileLoop

I am using Fortran to do calculation on huge data set which was split into many files. The names of the files are:

maltoLyo12per-reimage-set1.traj
maltoLyo12per-reimage-set2.traj
maltoLyo12per-reimage-set3.traj

The code I wrote to do the calculation is as below:

fileLoop: do j = 31, 34

 OPEN(unit=31,status='old',file=fileplace//'maltoLyo12per-reimage-set1.traj')
 OPEN(unit=32,status='old',file=fileplace//'maltoLyo12per-reimage-set2.traj')
 OPEN(unit=33,status='old',file=fileplace//'maltoLyo12per-reimage-set3.traj')
 OPEN(unit=34,status='old',file=fileplace//'maltoLyo12per-reimage-set4.traj')

 ... operation....

close (j)
end do fileLoop

During the run I want the code to open each file at a time and close them after finish calculation. But the above code will open all the files at once and close them one after one upon finish calculation.

So I tried to alter the code something like below:

fileLoop: do j = 31, 34

 OPEN(unit=j,status='old',file=fileplace//'maltoLyo12per-reimage-set1.traj')

close (j)
end do fileLoop

But here I am facing a problem with the file name. Each time the loop run, the file name doesn't change because of the phrase "set1" in the file name. I want the number in the file name to change like set1, set2, set3, etc., subsequently with file unit number 31,32,33,34, etc.

解决方案

Something like this: (edited to have unit numbers 31 to 34, filenames 1 to 4.)

character (len=90) :: filename

fileLoop: do j = 31, 34

 write (filename, '( "maltoLyo12per-reimage-set", I1, ".traj" )' )  j - 30
 OPEN(unit=j,status='old',file=filename)

close (j)
end do fileLoop

这篇关于循环使用变量文件名的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！