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Re: Number of line in a text file
Posted:
Nov 10, 2006 4:56 AM
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Ok. I have now a very efficient way to know the number of line in my
text file. Is it now possible to read very quickly just the last line
of the file ?
fgetl do not permit to acceed directly the last line of the file.
using dlmread with appropriate range is slow. Is there a quick way to
get the content of the last line ?
Thanks for your helps.
Benoît
Benoît Valley wrote:
>
>
> Thanks a lot for your explanations.
> Benoît.
>
> Kirill wrote:
>>
>>
>> Indeed -- 4.65sec vs former 7.6sec!!!
>>
>> JWagberg wrote:
>>> Kirill wrote:
>>> > while ~feof(fh)
>>> > ch = fread(fh, chunksize, 'uchar');
>>> > if isempty(ch)
>>> > break
>>> > end
>>> ...
>>> > n2 = n2 + sum(ch == char(10));
>>>
>>>
>>> Prepend the 'uchar' with an asterisk, '*uchar', and you can
> read
>> eight
>>> times as much with each chunk and the (ch == char(10)) will
> also
>> speed
>>> up by a factor five.
>>>
>>> /jewa
>>
>>
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