Re: [opendx-users] netCDF data file format

2000-06-21 Thread Peter Daniel Kirchner
You might want to look at http://www.research.ibm.com/showdown specifically http://www.research.ibm.com/dx/showdown/ds4html/ds4.html for netcdf multiresolution datasets and http://w3.pppl.gov/vde2000/data/OPENDX/ds4/ for the nets/macros . Pete Thomas Wolfanger wrote: Hello, I´m new to

[opendx-users] Re: hints

2000-06-21 Thread nancy collins
The bummer is that this means that the code for the divergence and curl assume a cartesian coordinate system. no, not correct. they only assume the coordinate system axes are orthogonal to each other in that coordinate system. so they can be [r,phi,z] and it all just works. you compute curl

Re: [opendx-users] Re: hints

2000-06-21 Thread Thomas A. Gardiner
Nancy, I'm afraid I don't understand how to do this. How can I convert a position (r,phi=0,z) to a circular line in (x,y,z)? Right, to display cylindrically symmetric data originally described in the (r,z) plane as a full 3-D cylindrically symmetric object, I would need to map the position say

[opendx-users] Re: hints

2000-06-21 Thread nancy collins
it is true that dx won't draw curved lines between 2 vertices; the spacing of the vertices will indeed control how smooth your curve plots, but my point is that if you do your computation before you convert from [r,z] to cartesian, it won't matter. it will be doing a real linear interpolation in

[opendx-users] Re: hints symmetrical calculations

2000-06-21 Thread Ned Piburn
This discussion is becoming painful. What we have here is a failure to communicate. Nancy is talking about a transform of coordinates that would, for example, take a 2D rectangle and wrap it around a cylinder (form the outside surface of a coffee can perhaps). This is a surface to surface