[Octave-bug-tracker] [bug #53685] textscan() with Delimiter specified always treats multiple delimiters as one

[anonymous]

URL:
  <http://savannah.gnu.org/bugs/?53685>

                 Summary: textscan() with Delimiter specified always treats
multiple delimiters as one
                 Project: GNU Octave
            Submitted by: None
            Submitted on: Wed 18 Apr 2018 02:46:48 AM UTC
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: frankd
        Originator Email: address@hidden
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.2.2
        Operating System: Microsoft Windows

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Details:

I have a data file that contains comma separated fields of known types. The
file is from an external device, so I can't change the format.

* Some numeric fields may _sometimes_ be null, nothing between two adjacent
commas
* The text fields may include spaces, and are not quoted

Using textscan() to read the file with %f and %s:

* Without using the Delimiter option, the null numeric fields correctly appear
as NaN, but the spaces in the string fields act as delimiters, creating extra
fields.
* Using the Delimiter option, the null numeric fields disappear, shifting all
subsequent fields
* The MultipleDelimsAsOne option seems to have no effect when used with the
Delimiter option.

A .m file with examples (using strings) is attached.



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File Attachments:


-------------------------------------------------------
Date: Wed 18 Apr 2018 02:46:49 AM UTC  Name: textscan_bug.m  Size: 3KiB   By:
None

<http://savannah.gnu.org/bugs/download.php?file_id=43964>

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