-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Chris,
thank you very much for your respond. Your arguments are clear. So, I will try to go that way. Regards Hans Georg - -- Otto-von-Guericke-Universitaet Magdeburg IGET | fon: +49 391 67 12195 Postfach 4120 | fax: +49 391 67 11236 39016 Magdeburg | email: [EMAIL PROTECTED] Germany | www: www.uni-magdeburg.de/krauthae Chris Pelkie schrieb: > Looks like no one took this one on. I was on vacation when you first wrote. > > Personally, I tend to prefer lots of small modular files. However, these > need not be standalone files if they share the same grid and/or > positions: those can be 1 or 2 additional files. > So you can easily create a field_01.dx file that references a > field_positions.dx and a field_connections.dx (common to all time steps) > and that field_01.dx file can directly contain as many "data'-like > components as you need, attached to those pos and conns. Then you end up > with lots of individual fields which can be easily assembled by one > series.dx file, which consists of nothing more than references to > field_01.dx, field_02.dx and so on. This also permits making quick test > series that contain only the first 2-3 files or every 10th file or > whatever. In extremely large time series, this is very convenient! > > Not sure what other problems you are having: do you have 3D positions > that appear to lie on the sphere? If not, use your lat-lon values and > deform them from rectangular to spherical polar: the 2D mesh will be > transformed along with the positions. If you have many vectors along > +-90 lat, you'll get a mess at the poles. You might need to average > their values, then use invalid positions to eliminate all but 1 for > clarity in the vector glyph plot you propose. > > On Aug 25, 2005, at 9:52 AM, Hans Georg Krauthaeuser wrote: > > Hey, > > After about 12 years of abstinence, I restarted to use opendx (I think > it was DataExplorer when I used it first). So my skills need a > refreshment... > > This is my problem: > I have 3D vector data (current density) located at some (26) points on > the surface of a sphere. Longitude and latitude spacing are constant. > Poles are included. The current data depends on two other parameters > (frequency (type float): up to 2000 values, t (type int): 60 values). > > What I wanted to get is: > - a 3D view of the sphere with the current vectors > - a 3D view of the magnitude of the current with smooth interpolation > - 2D projection of both > - possibility to chance the two parameters and redraw the images > > I think, I can do the plots when I have loaded the data. (Nevertheless, > pointers to examples or hints are very much appreciated). > > My question is: > What is the best way to organize the data? > A lot of small dx-files? One monster file? > How do I make a series with more than one parameter? With only the > frequency I would write: > > > object 1 class array type float rank 1 shape 3 items 26 data follows > ... > > object 2 class array type float rank 1 shape 3 items 26 data follows > ... > > object 1603 class field > component "positions" value 1 > component "data" value 2 > ... > object "series" class series > member 0 value 1603 position 1e+007 > ... > > Regards > Hans Georg Krauthaeuser > -- > Otto-von-Guericke-Universitaet Magdeburg > IGET | fon: +49 391 67 12195 > Postfach 4120 | fax: +49 391 67 11236 > 39016 Magdeburg | email: [EMAIL PROTECTED] > Germany | www: www.uni-magdeburg.de/krauthae > > > _______________________________ > Chris Pelkie > Scientific Visualization Producer > 622 Rhodes Hall, Cornell Theory Center > Ithaca, NY 14853 (607) 254-8794 > -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFDKRXUyoYnJ0CXgngRAtIsAJ9f2Obl1XSVujvb9T5AX9MoV+6+LQCcC+6p EjrNCG2M4lGRwlDfs7jPeMw= =uewb -----END PGP SIGNATURE-----
