Re: Reading ASCII data of unknown length

[niles]

>I need to read data (ASCII floating point numbers) from a file specified by 
>the user.  The trouble is that I don't know the length of the input file, so I 
>have to fscanf(...) until EOF, which generates an error message which may 
>alarm users.

Well this is something I wrote...it may do it for you...or give you a start.

        It's really slow for large files....

-------------------
jwe: Request: Please add reading of plain ASCII files as a single matrix w/
        - white space (space, tab) delimited columns
        - CR or NL delimited rows.
        - use the filename as the matrix name.
------------------

        Good Luck,
        Rick Niles.

----------------
% Function to read in time history file without titles.
% function data = loadth(title, header, ncols, nrows)
% by Rick Niles <address@hidden>
%
function data = loadth(title, header, ncols, nrows)
fp = fopen(title, "r");
fseek(fp, 0, SEEK_END);
eof = ftell(fp);
frewind(fp);
if (header)
   headeris  =1
   for col=1:ncols
      name = fscanf(fp, "%s")
   endfor
endif

if (~exist('nrows'))
   eoh = ftell(fp); 
   pos = 0;
   nrows = 1;
   while( pos < eof-4 )
      for col=1:ncols
         a = fscanf(fp, "%lf");
      endfor
      nrows++;
      pos = ftell(fp); 
   endwhile
   nrows
   fseek(fp, eoh, SEEK_SET);
endif

data = zeros(nrows,ncols);
pos = 0;
row = 1;
for row=1:nrows
   for col=1:ncols
      data(row,col) = fscanf(fp, "%lf");
   endfor
endfor

endfunction