From help-octave-request at bevo dot che dot wisc dot edu Sat Feb  1 23:46:52 2003
Subject: fscanf question
From: "John B. Thoo" <jb2 at ms dot yuba dot cc dot ca dot us>
To: help-octave at bevo dot che dot wisc dot edu
Date: Sat, 1 Feb 2003 21:43:18 -0800

Hi.  I have a question about using fscanf.  I've read the manual to no 
avail.  My problem is this.  I'm trying to read a data file with 400 
pairs of data in two columns using


meqn = 2;
mx = 180;
    data = fscanf(fid,'%g',[meqn,mx]);


When  mx <= 188,  all is well.  E.g., when  mx = 180,  I get


data =

  Columns 1 through 5:

     1.8981e-37    3.9947e-37    8.2387e-37    1.6695e-36    3.3303e-36
     0.0000e+00    0.0000e+00    0.0000e+00    0.0000e+00    0.0000e+00

  Columns 6 through 10:

     6.5473e-36    1.2698e-35    2.4309e-35    4.5952e-35    8.5783e-35
     0.0000e+00    0.0000e+00    0.0000e+00    0.0000e+00    0.0000e+00


etc., which is correct.  But when  mx >= 189,  all is _not_ well.  
E.g., when  mx = 190,  I get


data =

  Columns 1 through 6:

    0.0000000   0.0000000   0.0000000   0.0000000   0.0000000   0.0000000
    0.0000000   0.0000000   0.0000000   0.0000000   0.0000000   0.0000000

  Columns 7 through 12:

    0.0000000   0.0000000   0.0000000   0.0000000   0.0000000   0.0000000
    0.0000000   0.0000000   0.0000000   0.0000000   0.0000000   0.0000000


with zeros continuing to the end, so I can't read the entire data file 
(400 rows) correctly.  What am I doing wrong?

Thanks.

---John.



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