Info Catalog octave: Simple Output octave: C-Style I/O Functions octave: Formatted Output

octave: Line-Oriented Input

 
 14.2.3 Line-Oriented Input
 --------------------------
 
 To read from a file it must be opened for reading using ‘fopen’.  Then a
 line can be read from the file using ‘fgetl’ as the following code
 illustrates
 
      fid = fopen ("free.txt");
      txt = fgetl (fid)
           ⊣ Free Software is needed for Free Science
      fclose (fid);
 
 This of course assumes that the file ‘free.txt’ exists and contains the
 line ‘Free Software is needed for Free Science’.
 
  -- : STR = fgetl (FID)
  -- : STR = fgetl (FID, LEN)
      Read characters from a file, stopping after a newline, or EOF, or
      LEN characters have been read.
 
      The characters read, excluding the possible trailing newline, are
      returned as a string.
 
      If LEN is omitted, ‘fgetl’ reads until the next newline character.
 
      If there are no more characters to read, ‘fgetl’ returns −1.
 
      To read a line and return the terminating newline see ‘fgets’.
 
DONTPRINTYET       See also: fgets XREFfgets, fscanf XREFfscanf, *noteDONTPRINTYET       See also: fgets XREFfgets, fscanf XREFfscanf, 
      fread XREFfread, fopen XREFfopen.
 
  -- : STR = fgets (FID)
  -- : STR = fgets (FID, LEN)
      Read characters from a file, stopping after a newline, or EOF, or
      LEN characters have been read.
 
      The characters read, including the possible trailing newline, are
      returned as a string.
 
      If LEN is omitted, ‘fgets’ reads until the next newline character.
 
      If there are no more characters to read, ‘fgets’ returns −1.
 
      To read a line and discard the terminating newline see ‘fgetl’.
 
DONTPRINTYET       See also: fputs XREFfputs, fgetl XREFfgetl, *noteDONTPRINTYET       See also: fputs XREFfputs, fgetl XREFfgetl, 
      fscanf XREFfscanf, fread XREFfread, fopen XREFfopen.
 
  -- : NLINES = fskipl (FID)
  -- : NLINES = fskipl (FID, COUNT)
  -- : NLINES = fskipl (FID, Inf)
      Read and skip COUNT lines from the file specified by the file
      descriptor FID.
 
      ‘fskipl’ discards characters until an end-of-line is encountered
      exactly COUNT-times, or until the end-of-file marker is found.
 
      If COUNT is omitted, it defaults to 1.  COUNT may also be ‘Inf’, in
      which case lines are skipped until the end of the file.  This form
      is suitable for counting the number of lines in a file.
 
      Returns the number of lines skipped (end-of-line sequences
      encountered).
 
DONTPRINTYET       See also: fgetl XREFfgetl, fgets XREFfgets, *noteDONTPRINTYET       See also: fgetl XREFfgetl, fgets XREFfgets, 
      fscanf XREFfscanf, fopen XREFfopen.
 

Info Catalog octave: Simple Output octave: C-Style I/O Functions octave: Formatted Output