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Re: Import large field-delimited file with strings and numbers
From: |
Ben Abbott |
Subject: |
Re: Import large field-delimited file with strings and numbers |
Date: |
Sun, 07 Sep 2014 16:03:03 -0400 |
On Sep 7, 2014, at 3:17 PM, Francesco Potortì <address@hidden> wrote:
>> 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...
>
> 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); [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 :(
The doc-string indicates that a 2nd input is needed for fgetl() to read more
than one line.
-- Built-in Function: STR = fgetl (FID)
-- Built-in Function: 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'.
See also: fgets, fscanf, fread, fopen.
Ben
- Import large field-delimited file with strings and numbers, João Rodrigues, 2014/09/06
- Re: Import large field-delimited file with strings and numbers, Francesco Potortì, 2014/09/06
- Re: Import large field-delimited file with strings and numbers, Andreas Weber, 2014/09/06
- Re: Import large field-delimited file with strings and numbers, Joao Rodrigues, 2014/09/06
- Re: Import large field-delimited file with strings and numbers, Thomas D. Dean, 2014/09/06
- Re: Import large field-delimited file with strings and numbers, Francesco Potortì, 2014/09/07
- Re: Import large field-delimited file with strings and numbers,
Ben Abbott <=
- Re: Import large field-delimited file with strings and numbers, Francesco Potortì, 2014/09/07
- Re: Import large field-delimited file with strings and numbers, Ben Abbott, 2014/09/07
- Re: Import large field-delimited file with strings and numbers, Philip Nienhuis, 2014/09/08
- how does fscanf with "C" work?, Francesco Potortì, 2014/09/08
- Re: how does fscanf with "C" work?, Thomas D. Dean, 2014/09/08
- Re: how does fscanf with "C" work?, Francesco Potortì, 2014/09/09
- Re: Import large field-delimited file with strings and numbers, Petri Piila, 2014/09/07
- Re: Import large field-delimited file with strings and numbers, Francesco Potortì, 2014/09/07
Re: Import large field-delimited file with strings and numbers, Ben Abbott, 2014/09/06
Re: Import large field-delimited file with strings and numbers, Philip Nienhuis, 2014/09/06