| Re: Problem with large .txt file [message #55133 is a reply to message #55044] |
Tue, 31 July 2007 12:14   |
aleks.franca@gmail.co
Messages: 33
Registered: March 2007
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Member |
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On 31 jul, 15:58, "Jeff N." <jnett...@utk.edu> wrote:
> On Jul 31, 12:03 pm, "aleks.fra...@gmail.com" <aleks.fra...@gmail.com>
> wrote:
>
>
>
>> 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
>
> I must be missing something, but I don't see you actually using the
> variable i for anything. All you do is increment it each time around
> the loop. Unless this isn't the final version of your code and you're
> going to add functionality that uses that variable, you could take it
> out.
>
> Jeff
the variable i is counting for other functionality.
I`ve heard about IDL working with blocks. Every time it processes a
block, it frees the memory and brings another block to process. Does
IDL do that with reading txt large files?
thank you for your helps!
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