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Re: st: how to read very long text lines?


From   Carl Severson <carlseverson@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: how to read very long text lines?
Date   Fri, 8 Mar 2013 00:17:36 -0700

Is there a specific reason you are using Stata to do this?

I feel like there are a number of better tools to choose from... perl,
python, unix command line tools which I can't seem to remember the
names of this late at night, for example

Carl Severson

On Fri, Mar 8, 2013 at 12:13 AM, Li Chuntao (Tony) <leechtcn@gmail.com> wrote:
> I want to copy a specific line of a text file to another text file.
> the line number is given, say 2nd line, but this line is too long,
> more than 1000 characters.
>
> Can I use "file read" and "file write" to handl it?
>
>
>
> On Fri, Mar 8, 2013 at 2:58 PM, Phil Clayton
> <philclayton@internode.on.net> wrote:
>> What are you actually trying to achieve?
>> Phil
>>
>> On 08/03/2013, at 5:56 PM, "Li Chuntao (Tony)" <leechtcn@gmail.com> wrote:
>>
>>> Thank you, Ryan. But i am still lost with my file reading.
>>>
>>> Tony
>>>
>>>
>>> On Fri, Mar 8, 2013 at 2:30 PM, Ryan Kessler
>>> <ryan.kessler.stata@gmail.com> wrote:
>>>> Hi Tony,
>>>>
>>>> The key here is to steer clear of the "=" sign; see -help macro-,
>>>> -help limits-, and -help extended_fcn-.
>>>>
>>>> local long ""
>>>> forval i=1/500 {
>>>>        local long "`long' `=`i'^2'"
>>>> }
>>>> di "`long'"
>>>> di length("`long'")
>>>> di "`: length local long'"
>>>>
>>>> Related discussion -->
>>>> http://www.stata.com/statalist/archive/2011-09/msg00973.html
>>>>
>>>> Best,
>>>>
>>>> Ryan Kessler
>>>>
>>>> On Thu, Mar 7, 2013 at 11:22 PM, Li Chuntao (Tony) <leechtcn@gmail.com> wrote:
>>>>> Dear Listers,
>>>>>
>>>>>    I want to use Stata to read a text file line by line. Suppose the
>>>>> file is d:\temp.txt. one of the line i specially interested is very
>>>>> long, more than 1000 characters. I use the following code to read:
>>>>>
>>>>> capture file close myread
>>>>> file open myread using d:\temp.txt , read text
>>>>> file readmyrea line
>>>>> while r(eof)==0 {
>>>>>  local linenum = `linenum' + 1
>>>>>  local myline=`" `macval(line)'"'
>>>>>  disp length(`"`macval(myline)'"')
>>>>>  file myrea hexun line
>>>>>
>>>>> }
>>>>> file close hexun
>>>>>
>>>>> It seems that the maximium length for a string here is only 240.
>>>>>
>>>>> Is it possible to change it to longer?
>>>>>
>>>>> thanks
>>>>>
>>>>> Tony
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