Re: Re Re: [Pytables-users] Suggestions for storing mutlidimensionnal data in several pytables arrays

[Cyril G. <cyr...@fr...>]

Hello World :-),

That seems a very good news for the simulation methods based upon 
structured grid  (i, j, k) mesh like finite differences in time domain.
For instance in electromagnetism, people use to stock matrices
X[i],
Y[j],
Z[k],
Ex[i,j,k],
Ey[i,j,k],
Ez[i,j,k],
Hx[i,j,k],
Hy[i,j,k],
Hz[i,j,k]
independantly. 

Why ? Because during the computation, there is no need of X, Y, Z.

In pytables, one can write these matrices but there is no standard way 
to say :
The first dimension of Ex is linking to X, the second to Y and the third 
to Z.

We could even imaging :
The first dimension of  Ex is linking  to X[i1:i2:i3]  (begin, end, 
step) and so on...

And that 's the point, linking matrix sides to some arrays description. 
"netcdf" allows such a feature but netcdf is usefullless with python, 
and i like pytables, "very good job".
It's the way to do simulation with scripting languages.

Thanks for your work.

Cyril.