|
Re: Number of line in a text file
Posted:
Jan 23, 2013 1:51 PM
|
|
On Thursday, January 24, 2013 7:04:19 AM UTC+13, dpb wrote: > On 1/23/2013 1:34 AM, leeward.xie@gmail.com wrote: > > > On Thursday, November 2, 2006 2:26:12 AM UTC+8, Beno�t Valley wrote: > > >> I need to determine the number of line in a text file. > > >> > > >> Is there a more efficient way that using getl in a while loop ? > > >> > > >> Thanks, > > >> Beno�t > > > > > > nrows = numel(cell2mat(textscan(fid,'%1c%*[^\n]'))) > > > > If going to do that, would be faster to use a stream form and fread(). > > > > I've not timed it but if going to go text route here's where textread() > > would have the advantage of > > a) not require separate fopen() and > > b) returns an array instead of cell so can skip the cell2mat() > > > > --
Another solution is to use Perl which is packaged with Matlab: Put these two lines in a file called countlines.pl while (<>) {}; print $.,"\n";
Now: perl 'countlines.pl' 'myfile.txt' or nlines=perl('countlines.pl','myfile.txt')
|
|