Re: TMatrix compatibility between v3.10/02 and v4.03/02

Hi Rene and Eddy,
  Your welcome, and thanks for taking the time to fix it. --Chris

Rene Brun wrote:

>Hi Chris,
>
>Thanks for reporting this compatibility problem with 3.10.
>This is now fixed (thanks Eddy) in the CVS head.
>
>Rene Brun
>
>On Sat, 26 Mar
>2005, Chris Crawford wrote:
>
>
>
>>Hi Rene,
>> Here is an example:
>>--thanks, Chris
>>
>>// root-v3.10/02
>>{
>> TFile f("a.root","recreate");
>> TMatrix m(2,3);
>> m(0,0)=1; m(0,1)=3; m(0,2)=5;
>> m(1,0)=2; m(1,1)=4; m(1,2)=6;
>> m.Print();
>> m.Write("m");
>> m.GetElements();
>> f.Close();
>>}
>>
>>Matrix 2x3 is as follows
>>
>> | 0 | 1 | 2 |
>>------------------------------------------------------------------
>> 0 | 1 3 5
>> 1 | 2 4 6
>>
>>elements: [ 1 2 3 4 5 6 ]
>>
>>//root-v4.01/02 or v4.03/02
>>{
>> TFile f("a.root");
>> m->Print();
>> m->GetMatrixArray();
>>}
>>
>>2x3 matrix is as follows
>>
>> | 0 | 1 | 2 |
>>------------------------------------------------------------------
>> 0 | 1 2 3
>> 1 | 4 5 6
>>
>>elements: [ 1 2 3 4 5 6 ]
>>
>>Rene Brun wrote:
>>
>>
>>
>>>Hi Chris,
>>>
>>>ROOT version 4 is already doing this. You should be able to read
>>>old style matrices with the new version.
>>>Could you send a very short file with an example that does not work?
>>>
>>>Rene Brun
>>>
>>>On
>>>Fri, 25
>>>Mar 2005, Chris Crawford wrote:
>>>
>>>
>>>
>>>
>>>
>>>>Hello,
>>>> When I try and read TMatrices from v3 root files in root-v4, it
>>>>switches between row-major and column major, jumbling up the entries.
>>>>Is there some way that the class Schema can fix this? I notices the
>>>>class version jumped from 2 to 3.
>>>>--thanks, Chris
>>>>
>>>>
>>>>
>>>>
>>>>
>>
>>
Received on Tue Mar 29 2005 - 22:56:25 MEST