[FLASH-USERS] Question about direct manipulation of Flash HDF5 data

[Ken Dere]

Another alternative is to use the Python PyTables module.  It is pretty
straightforward.  If you are interested, I can send a short Python
function that just lists the nodes in an hdf file.  I also shows the
basic mechanics of just opening an hdf file.

Ken

Cole Miller wrote:
>
> Hi all,
>
> I'd appreciate some help in terms of processing HDF5 output
> files from FLASH3.0 beta.  I've been able to run several of
> the test problems successfully and have used the xflash3 widget
> to produce images, do 1-d readout, et cetera.  So far, so good.
> However, for serious processing I need to be able to do a number
> of other things.  For example:
>
> 1. At a given x,y,z point in the simulation region, what is the
>    time history of the pressure?
>
> 2. What is the temperature over a uniform grid at a given time slice,
>    resampled from a nonuniform AMR grid?
>
> Basically, I'd like more direct control over the data.
>
> In principle I suppose that since an IDL widget can access this
> information, there should be a way to print it out directly from
> IDL.  However, I haven't used IDL before; any suggestions?  I have
> also tried to use the h5dump feature on individual files, but I
> have no experience with the output format (DDL or XML), and it
> looks like it would be a major endeavor to extract the required
> information from the ASCII output.  I've also tried, briefly, to
> look through some of the C routines on the HDF site that are supposed
> to be able to read HDF5 files, but have yet to surmount difficulties
> related to various libraries to which I need to link (maybe this can
> be solved by setting PATH variables in some way?).
>
> Anyway, any help would be great!
>
> Thanks,
> Cole

-- 
Kenneth P. Dere
Research Professor of Solar Physics
Dept. of Computation and Data Sciences
MS 6A2
George Mason University
4400 University Drive
Fairfax VA 22030
703-993-4555
703-993-1992 FAX
kdere at gmu.edu