[Octave-bug-tracker] [bug #35252] incorrect loading of file (file saved in same octave version)

[anonymous]

URL:
  <http://savannah.gnu.org/bugs/?35252>

                 Summary: incorrect loading of file (file saved in same octave
version)
                 Project: GNU Octave
            Submitted by: None
            Submitted on: Fri 06 Jan 2012 05:24:25 PM UTC
                Category: Libraries
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: Liesbeth Janssen
        Originator Email: address@hidden
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 3.2.3
        Operating System: GNU/Linux

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Details:

When saving a (binary) file in octave and loading it in the *same* session,
all variables are loaded correctly. Example:

octave:1> octave_path; constants;
octave:2> who
Variables in the current scope:

Ang        c0au       mAr        mCl        mLi6       mO18
Debye      cm1        mB         mCl37      mMg        mP
Debye_g98  coulomb    mB10       mD         mN         mS
GHz        eV         mBe        mF         mN15       mSi
MHz        g_e        mBr        mH         mNa        mXe
NA         gauss      mBr79      mHe        mNe        second
Vcm1       joule      mBr81      mHe3       mNe21      tesla
amu        kboltz     mC         mI         mNe22
ans        kcal       mC13       mK         mO
c0         mAl        mCa        mLi        mO17

octave:3> Ang
Ang =  1.8897
octave:4>
octave:4> save('x.mat','-binary')
octave:5> clear all
octave:6> who
octave:7> load('x.mat')
octave:8> who
Variables in the current scope:

Ang        c0au       mAr        mCl        mLi6       mO18
Debye      cm1        mB         mCl37      mMg        mP
Debye_g98  coulomb    mB10       mD         mN         mS
GHz        eV         mBe        mF         mN15       mSi
MHz        g_e        mBr        mH         mNa        mXe
NA         gauss      mBr79      mHe        mNe        second
Vcm1       joule      mBr81      mHe3       mNe21      tesla
amu        kboltz     mC         mI         mNe22
ans        kcal       mC13       mK         mO
c0         mAl        mCa        mLi        mO17

octave:9> exit

(all of these variables are floating point numbers; see attached file
constants.m)

Now, when starting a new octave session and reloading the file x.mat, some
variables are missing (in this example e.g. Ang, amu, c0, ...):

octave:1> who
Variables in the current scope:

ans

octave:2> load('x.mat')
octave:3> who
Variables in the current scope:

Debye      c0au       mB         mCa        mMg        mO18
Debye_g98  coulomb    mB10       mCl37      mN15       mP
GHz        g_e        mBe        mHe3       mNa        mSi
MHz        gauss      mBr        mI         mNe        mXe
NA         joule      mBr79      mK         mNe21      second
Vcm1       kboltz     mBr81      mLi        mNe22      tesla
ans        mAl        mC13       mLi6       mO17


However, the missing variable(s) can be loaded correctly if the corresponding
variable name is first initialized. Example:

octave:4> Ang
error: `Ang' undefined near line 4 column 1
octave:4> Ang=1
Ang =  1
octave:5> load('x.mat')
octave:6> Ang
Ang =  1.8897
octave:7> who
Variables in the current scope:

Ang        ans        mAl        mC13       mLi6       mO17
Debye      c0au       mB         mCa        mMg        mO18
Debye_g98  coulomb    mB10       mCl37      mN15       mP
GHz        g_e        mBe        mHe3       mNa        mSi
MHz        gauss      mBr        mI         mNe        mXe
NA         joule      mBr79      mK         mNe21      second
Vcm1       kboltz     mBr81      mLi        mNe22      tesla


(note that only Ang is added, other variables such as amu and c0 are still
missing)

The problem seems to be independent of file format; omitting the '-binary'
flag, or using e.g. '-v7', makes no difference. 

The saving and loading is done in the same version of octave, so this is *not*
a compatibility issue between different versions.



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File Attachments:


-------------------------------------------------------
Date: Fri 06 Jan 2012 05:24:25 PM UTC  Name: constants.m  Size: 3kB   By: None

<http://savannah.gnu.org/bugs/download.php?file_id=24749>

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