[Carpet] using IO*::one_file_per_group

[Luca Baiotti]

Thomas Radke wrote:
> Peter Diener wrote:
>> Hi,
>>
>> That would be a useful feature indeed.
>>
>> In addition it would also be nice to be able to specify different 
>> out_every values to different variables. For example when we decompose 
>> psi4 into spherical harmonics we output a 2d grid array. I typically want 
>> to do that more often than 2d ouput of 3d grid functions.
> 
> That you can do already via option strings attached to group/variable 
> names, like this:
> 
>    IOASCII::out_every   = 100
>    IOASCII::out1D_every = "admbase::metric admbase::lapse{ out_every = 10 }"
> 
> The same I would do for outputting one file per variable/group.

Yes, I think this would be useful.

Luca.