[petsc-dev] printing the matrix name via -mat_view_info

[Shri]

Can the object name be also displayed when the option -<object>_view is provided or <object>View() is called? Maybe only for matrices,vectors and DAs??

Instead of

row 0: (0, 4) 
row 1: (1, 4) 
row 2: (2, 4) 
row 3: (3, 4) 
row 4: (4, 4) 

It should display

Matrix Object : <matrix_name>
row 0: (0, 4) 
row 1: (1, 4) 
row 2: (2, 4) 
row 3: (3, 4) 
row 4: (4, 4) 

Shri
----- Barry Smith <bsmith at mcs.anl.gov> wrote:
> 
>   I have added PetscObjectPrintClassNamePrefixType() which is now (in theory) used uniformly in all the XXXView ASCII info formats to display this information appropriately. A nice improvement, eliminated lots of duplicate code and makes it easier to have uniform output.
> 
>   PetscObjects are NOT given names by default, you should call PetscObjectSetName() to give it a name.  In a small number of places when an object NEEDS a name, for example when it is saved to Matlab with that variable name then PetscObjectName() is called to generate a "unique" name.
> 
>    Thanks for the suggestion,
> 
>    Barry
> 
> >  What does PetscObjectName() do??Generate a random name??
> 
> Currently it generates a name that looks like
> 
> classname_commid_number
> 
> where number is incremented sequentially.
> 
> I would lean towards always naming everything so that a unique
> identifier is available.  Unfortunately, doing so would make all the
> test output non-reproducible because the identifier (for generated
> names) includes some run-dependent information (commid above).  Maybe
> name everything, but have an option to turn it off?
> 
> 
> On Sep 29, 2010, at 2:28 PM, Shri wrote:
> 
> > Is there a way to print the matrix name so that -mat_view_info prints it out.
> > 
> > Instead of
> > 
> > Matrix Object:
> >  type=mpiaij, rows=200, cols=200
> >  total: nonzeros=40000, allocated nonzeros=40000
> >  total number of mallocs used during MatSetVal
> > 
> > it should print
> > 
> > Matrix Object: <MATRIX_NAME>
> >  type=mpiaij, rows=200, cols=200
> >  total: nonzeros=40000, allocated nonzeros=40000
> >  total number of mallocs used during MatSetVal
> > 
> > It'll be nice to have the matrix name printed out cause sometimes it gets confusing when there are a lot of matrices you are working with. 
> > Either the user can set a name and it could be printed out in mat_view_info or even better if in some way the variable name can be used directly.
> > 
> > What do you think?
> > 
> > Shri
>