Re: [visad] new to visAD hiding@xxxxxxxxx; Thu, 19 Mar 2009 13:20:16 -0500

 Robert,

The key question is whether there are function
dependencies among your variable? Specifically,
is Z a function of X and Y? If so, then you would
not add the 'p' column and the first line would be:

(x,y)->z

Tom's description of his text file format is at:

http://www.ssec.wisc.edu/~billh/README.text

Good luck,
Bill

  ----- Original Message -----
  From: "Tom Whittaker"
  To: "Robert Stones"
  Subject: Re: [visad] new to visAD
  Date: Thu, 19 Mar 2009 12:41:32 -0500


  Another way to approach this. First, if you will allow me to remake
  your text file into this:

  (x,y,z)->p
  x,y,z,p
  1, 3, 6, 1000
  2, 12, 4, 1012
  8, 18, 5, 1005
  9,4, 7, 990

  Then in Jython:

  from visad.python.JPythonMethods import *
  a = load("test.txt")
  dumpTypes(a)

  you get:

  VisAD MathType analysis
  FunctionType:
  Domain has 3 components:
  0. RealType: x
  0. Name = x
  1. RealType: y
  1. Name = y
  2. RealType: z
  2. Name = z
  Range:
  RealTupleType has 1 components:
  0. RealType: p
  0. Name = p
  - - - - - - - - - - - - - - - - - - - - - - -
  DataType analysis...
  FlatField of length = 4
  ((x, y, z) -> p)
  Domain has 3 components:
  Irregular3DSet (x, y, z) Length = 4
  Range has 1 components:
  0. FloatSet (p) Dimension = 1
  0. number missing = 0

  Is this what's you're after? (Pardon my use of Jython -- it's just so
  much quicker for me.....).

  tom


  On Thu, Mar 19, 2009 at 3:45 AM, Robert Stones wrote:
  > Hi
  >
  > I am new to visAD and I am having trouble in getting my head round
  > converting my 3D data
  > to the visAD data objects.
  >
  > Do you have a very simple example - if I have a file with:
  >
  > x  y z
  > 1  3 6
  > 2  12  4
  > 8  18  5
  > 9  4 7
  >
  > how do I get this into a simple Set (3DGriddedSet - none linear)
  that I can
  > then display
  > in a 3D display.
  >
  > also for data where its irregular using Iregular3DSet - just a
  simple
  > example using the
  > simple data above.
  >
  > Struggling to follow the tutorials - a simple example of just
  reading in the
  > data would
  > get me on my way.
  >
  > Thanks
  >
  > Robert
  >
  > CSL Bioinformatics Internet Pages at
  http://bioinformatics.csl.gov.uk
  >
  ----------------------------------------------------------------------
  > Robert Stones MRes, BSc  Phone:  +44 (0)1904 462675
  > Higher Bioinformatics Specialist  GTN:  5129 2675
  > Central Science Laboratory  Fax:  +44 (0)1904 462111
  > Sand Hutton Email:  r.stones@xxxxxxxxxx
  > York YO41 1LZ Web:  http://www.csl.gov.uk
  >
  ----------------------------------------------------------------------
  >
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  > visad mailing list
  > visad@xxxxxxxxxxxxxxxx
  > For list information, to unsubscribe, visit:
  > http://www.unidata.ucar.edu/mailing_lists/
  >



  --
  Tom Whittaker
  University of Wisconsin-Madison
  Space Science & Engineering Center (SSEC)
  Cooperative Institute for Meteorological Satellite Studies (CIMSS)
  1225 W. Dayton Street
  Madison, WI 53706 USA
  ph: +1 608 262 2759

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