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Re: Import large field-delimited file with strings and numbers

From: Francesco Potortì
Subject: Re: Import large field-delimited file with strings and numbers
Date: Sun, 07 Sep 2014 22:52:03 +0200

Joao Rodrigues:
>>> To answer Francesco's comment, fscanf allows for size specification 
>>> without loop, but I don't know how to write the template indicating that 
>>> commas (or something else) is a separator. Furthermore, even if the 
>>> separator is whitespace as output I got a concatenated string instead of 
>>> multiple fields...

Francesco Potortì:
>> Hm.  I tried myself but can't get fscanf to read multiple lines...
>> Here is what I get:
>> ===File ~/math/workarea/test.txt============================
>> field1, field2, field3, field4
>> A,        a,        1,       1.0,
>> B,        b,        2,        2.0,
>> C,        c,        3,        3.0,
>> ============================================================
>> octave> fid=fopen("test.txt");
>> octave> fgetl(fid);
>> octave> [v1, v2, v3, v4, count, errmsg]=fscanf(fid, "%s%s%d,%f,", "C")
>> v1 = A,
>> v2 = a,
>> v3 =  1
>> v4 =  1
>> count =  4
>> errmsg = 
>> octave> fclose(fid);
>> So everything is nice and good, but fscanf stops at the first row of
>> data...
>> Oh, and I also tried twith a template "%s%s%d,%f,\n", explicitely
>> adding a newline at the end, because the Octave manual does not say what
>> a "whitespace" is, but no change :(

Ben Abbott:
>The doc-string indicates that a 2nd input is needed for fgetl() to read more 
>than one line.

Hm, maybe the way I wrote it was cconfusing.  I now edited the above
cited text by adding a newline and a prompt in my code for increased

In the code, fgetl is just used to get rid of the header line.  My
problem is with fscanf, which in my plan should read all the subsequent
lines, but only reads the first one after the header line.

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