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RE: Réf. : Using SimpleGrid...?



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OK...now I'm doing it

I'll bet the perpetrator is: Administrator@noaaspam06.newworldapps.com

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-----Original Message-----
From: kohlja@ornl.gov [mailto:kohlja@ornl.gov] 
Sent: Friday, April 29, 2005 11:01 AM
To: Administrator@noaaspam06.newworldapps.com
Cc: James Kohl; sgt@noaa.gov
Subject: Re: Réf. : Using SimpleGrid...?


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  On Fri, Apr 29, 2005 at 11:44:07AM +0200, Laurent BEIGBEDER wrote:
  > Hi,

Hi Laurent,

Thanks for your reply (all 12 copies of it! :).

  > What do you mean by associatedData?

I must not be using SimpleGrid correctly - I had tried passing a SimpleGrid
instance directly into the rpl.addData() call, and it generated a Null
Pointer exception, so I did some browsing through the Java Docs and thought
that perhaps I needed to pass instead SimpleGrid.getAssociatedData()...

  > I use it with double arrays with following constraints: grid.length ==
  > xloc.length*yloc.length

This seems to be the problem - I was passing in values like this:

	grid[0] = Z0 / xloc[0] = X0 / yloc[0] = Y0
	grid[1] = Z1 / xloc[1] = X1 / yloc[1] = Y1
	grid[2] = Z2 / xloc[2] = X2 / yloc[2] = Y2
	. . .

So are you saying that I should have passed in:

	grid[0] = Z(X0,Y0)
	grid[1] = Z(X0,Y1)
	grid[2] = Z(X0,Y2)
	. . .
and
	xloc[] = { 0, 1, 2, . . . , ncols - 1 }
	yloc[] = { 0, 1, 2, . . . , nrows - 1 }
???

I thought I had already tried this, but let me look again...

Please clarify if I'm still not understanding SimpleGrid usage...!

  > then, if sg is the new SimpleGrid.
  >     sg.setXMetaData(new SGTMetaData("Distance","km"));
  >     sg.setYMetaData(new SGTMetaData("Height","m"));
  >     sg.setZMetaData(new SGTMetaData("Depth","cm"));

Is is *necessary* to set this MetaData...?

Please let me know.  I wasn't doing this either...

Thanks Much!  :-)

	Jim

  > then put it in a JPlotLayout

  >     /*
  >      * Create the layout without a Logo image and with the
  >      * ColorKey on a separate Pane object.
  >      */
  >     JPlotLayout rpl = new JPlotLayout(true, false, false, "test layout",
  > null, true);
  >     rpl.setEditClasses(false);
  >     /*
  >      * Create a GridAttribute for CONTOUR style.
  >      */
  >     Range2D datar = new Range2D(-20.0f, 45.0f, 5.0f);
  >     //Range2D datar = new Range2D(0.0f, 1.0f, 5.0f);
  >     clevels = ContourLevels.getDefault(datar);
  >     gridAttr_ = new GridAttribute(clevels);
  >     /*
  >      * Create a ColorMap and change the style to RASTER_CONTOUR.
  >      */
  >     ColorMap cmap = createColorMap(datar);
  >     gridAttr_.setColorMap(cmap);
  >     gridAttr_.setStyle(GridAttribute.RASTER_CONTOUR);
  >     /*
  >      * Add the grid to the layout and give a label for
  >      * the ColorKey.
  >      */

  >     rpl.addData(newData, gridAttr_, "Test data");

  >     rpl.setTitles("Demo d'essai",
  >                   "Utilisant JPlotLayout",
  >                   "et voila =)","");

  >     rpl.setSize(new Dimension(500, 400));
  >     rpl.setKeyLayerSizeP(new Dimension2D(2.0, 6.0));
  >     rpl.setKeyBoundsP(new Rectangle2D.Double(0.01, 5.99, 1.98, 5.98));

  > Regards,

  > Laurent BEIGBEDER
  > GFI Informatique
  > Toulouse - FRANCE



  > Veuillez répondre à James Kohl <kohlja@ornl.gov>

  > Pour : sgt@noaa.gov
  > cc :   kohlja@ornl.gov

  > Objet :     Using SimpleGrid...?


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  > Help!

  > I'm a new user, trying to use SGT for a simple applet
  > demo, and cannot seem to create a valid SimpleGrid for
  > passing into a JGridDemo setup...  (I have started
  > with your JGridDemo.java example, and am trying
  > to replace the TestData with my own data grid).

  > I have created a SimpleGrid using the

  > ( double [] grid, double [] xloc, double [] yloc, String )

  > constructor, with X and Y coordinates in xloc[] and yloc[],
  > resp, and Z values in grid[], but the resulting SimpleGrid
  > has null "AssociatedData"...?!

  > How do I get my "Z" values (the actual data) into the grid?

  > Any help would be greatly appreciated, ASAP!

  > Thanks Much!

  >     James Kohl, PhD
  >     Oak Ridge National Laboratory



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