| Re: Problem with large .txt file [message #55136 is a reply to message #55044] |
Tue, 31 July 2007 11:06  |
Conor
Messages: 138
Registered: February 2007
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Senior Member |
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On Jul 31, 1:36 pm, Conor <cmanc...@gmail.com> wrote:
> On Jul 31, 1:15 pm, hradilv <hrad...@yahoo.com> wrote:
>
>
>
>> On Jul 31, 11:27 am, "Haje Korth" <haje.ko...@nospam.jhuapl.edu>
>> wrote:
>
>>> set i ti i=0l (make it a long)
>
>>> H.
>
>>> <aleks.fra...@gmail.com> wrote in message
>
>>> news:1185897834.196562.301440@57g2000hsv.googlegroups.com...
>
>>>> Hy there!
>>>> I have a large txt file (6.384KB) with 65000 lines. It's very large.
>>>> I need to open it, read every line, replace the spaces for commas, and
>>>> write the result in an output.txt
>
>>>> The code is ok. The problem is that idl crashes on line 7208. There's
>>>> a memory problem there.
>
>>>> Is there any way to do for all the lines of the txt file?? I don't
>>>> know how to deal with memory problems. Sorry!
>
>>>> I'm doing like this
>
>>>> :-----------------CUT HERE--------------------
>>>> i=0
>>>> line=''
>>>> ; Open the text file:
>>>> OPENR, inunit, '60mil_equal.txt', /GET_LUN
>>>> ; Open the terminal as a file:
>>>> OPENW, outunit, 'output.txt', /GET_LUN
>>>> ;================================
>>>> WHILE ~EOF(inunit) DO BEGIN
>>>> READF, inunit, line
>>>> line = STRJOIN(STRSPLIT(line, /EXTRACT), ', ')
>>>> PRINTF, outunit, line
>>>> i =i+1
>>>> ENDWHILE
>
>>>> FREE_LUN, inunit
>>>> FREE_LUN, outunit
>
>>>> END
>>>> :-----------------CUT HERE--------------------
>
>>>> Thank you very much
>
>> Or just use sed... Right tool for the right job.
>
> I was going to say use perl, but I suppose that's a bit simpler.
>
> sed 's/ /,/g' < 60mil_equal.txt > output.txt
>
> viola! Simple and elegant.
>
> Of course, considering that your files have a .txt extension, it seems
> likely that you are on a windows machine, and therefore have no access
> to sed. In that case, I would recommend learning perl, which can
> easily be installed on windows. A better option would be to just use
> linux or mac :)
Also, you could do this same thing in just about any text editor.
Even Microsoft Word has a find/replace option which would easily do
this. Notepad might too. I mention this simply because IDL really
isn't the best language for string parsing/editing. Other than that,
I'm afraid I'm out of suggestions. I don't see any problems with your
code.
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