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


From   "Li Chuntao (Tony)" <leechtcn@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: how to read very long text lines?
Date   Fri, 8 Mar 2013 15:13:28 +0800

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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>
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