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[Octave-bug-tracker] [bug #30909] OO code failing under 3.3.52+


From: Pascal Dupuis
Subject: [Octave-bug-tracker] [bug #30909] OO code failing under 3.3.52+
Date: Mon, 30 Aug 2010 16:22:24 +0000
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2.8) Gecko/20100723 Ubuntu/10.04 (lucid) Firefox/3.6.8

URL:
  <http://savannah.gnu.org/bugs/?30909>

                 Summary: OO code failing under 3.3.52+
                 Project: GNU Octave
            Submitted by: cdemills
            Submitted on: lun 30 aoû 2010 16:22:23 GMT
                Category: Interpreter
                Severity: 3 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: Pascal Dupuis
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: dev
        Operating System: GNU/Linux

    _______________________________________________________

Details:

Hello,

while trying the latest code from mercurial, I've got a problem. The class
constructor calls private/df_pad.m, which fails as follows:

function df = df_pad(df, dim, n, coltype=[])
  switch dim
    case 1
      %# complete row indexes
      if isempty(df._ridx),
        dummy = (1:n).';
      else
        dummy = vertcat(df._ridx, repmat(NA, n, size(df._ridx, 2))); 
      endif
      df._ridx = dummy; <= fails

the code is called with an empty dataframe, dim = 1, n = 10.

Error message is
malformed class
assignement failed, or no method for 'class=matrix'

In principle, the assignement must be performed through subasgn, which it
itself busy calling df_pad. The code works under 3.2.4, is there some reason
while it fails under 3.3.52 ? Should I play between classes and struct to
handle directly modifications of the class variable ?

The problem can be reproduced as follows:
- install the dataframe package from octave-forge
- x=dataframe('octave_frame/data_test.csv');


Regards

Pascal




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