Hi Xinman,
Following Bill's suggestions, and using the notation conventions I suggested
in a recent email, I had a go at the Time Series Display question you
raised earlier (17 Nov).
The code is attached as TimeSeries.txt
To try it out:
* copy it to your visad\examples directory
* rename it TimeSeries.java
* compile (eg javac *.java)
* run (java TimeSeries)
I've deliberately used a 2D display rather than a 3D display,
as we are doing some tests on IBM AIX workstations which
don't have Java 3D :-(
( for those interested the IBM beta release of Java 2 for AIX 4.3.3
looks ok so far: only 1 problem we have noticed relating to loading
resources)
Hope this helps,
James
"From: Bill Hibbard " wrote:
> Hi Xinman,
>
> I'm in the UK and can only answer briefly. Study these
> Sections of the VisAD Developers Guide:
>
> 3.1.14 Application Example: Synthesizing MathTypes
> 3.2.14 Application Example: Synthesizing Fields
>
> and also visad/examples/Test03.java.
>
> You need to Construct a FunctionType:
>
> (RealType.Time -> temperature)
>
> and use DateTime to help construct a Linear1DSet for your
> dates/times (which appear to be evenly spaced - if they
> weren't you'd construct a Gridded1DDoubleSet instead of
> the Linear1DSet).
>
> Then construct a FlatField from these, and call setSamples()
> to put your temperature values in it.
>
> Then construct a DisplayImplJ3D (or DisplayImplJ2D), link
> it to your FlatField (as in Test03.java or any other
> example), and construct ScalarMaps:
>
> ScalarMap(RealType.Time, Display.XAxis)
> ScalarMap(temperature, Display.YAxis)
>
> and addMap() these to the DisplayImplJ*D. Study the guide
> and the examples, and hopefully it will become clear.
>
> Cheers,
> Bill
> ----------------------------------------------------------
> Bill Hibbard, SSEC, 1225 W. Dayton St., Madison, WI 53706
> hibbard@xxxxxxxxxxxxxxxxx 608-263-4427 fax: 608-263-6738
> http://www.ssec.wisc.edu/~billh/vis.html
--
James Kelly
Supervisor of Regional Development Bureau of Meteorology
PO Box 1289K Melbourne 3001, Australia
Phone: 61-3-9669-4724 Fax: 61-3-9669-4128 Email: J.Kelly@xxxxxxxxxx
/*
VisAD system for interactive analysis and visualization of numerical
data. Copyright (C) 1996 - 1999 Bill Hibbard, Curtis Rueden, Tom
Rink, Dave Glowacki, Steve Emmerson, Tom Whittaker, Don Murray, and
Tommy Jasmin.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
MA 02111-1307, USA
*/
//
// Time Series, based on Test03
// by James Kelly Dec 1999
//
import java.awt.Component;
import java.rmi.RemoteException;
import visad.*;
import visad.java2d.DisplayRendererJ2D;
import visad.java2d.DisplayImplJ2D;
import visad.util.AnimationWidget;
public class TimeSeries
extends UISkeleton
{
public TimeSeries() { }
public TimeSeries(String[] args)
throws RemoteException, VisADException
{
super(args);
}
DisplayImpl[] setupServerDisplays()
throws RemoteException, VisADException
{
DisplayImpl[] diDisplay = new DisplayImpl[1];
diDisplay[0] = new DisplayImplJ2D("display");
return diDisplay;
}
void setupServerData(LocalDisplay[] diDisplay)
throws RemoteException, VisADException
{
//
// PART 1 : define the meta data (math types)
//
// define all RealTypes (rt) and RealType Arrays (rta)
RealType rtTemperature = new RealType("rtTemperature", null, null);
RealType[] rtaTemperature = {rtTemperature};
RealType[] rtaTime = {RealType.Time};
// define all RealTypeTypes (rtt) from RealType Arrays (rta)
RealTupleType rttTemperature = new RealTupleType(rtaTemperature);
RealTupleType rttTime = new RealTupleType(rtaTime);
// define all FunctionTypes (ft) which are mappings from one
rtt to another rtt
FunctionType ftTime2Temperature = new FunctionType(rttTime, rttTemperature);
//
// PART 2 : create the actual data, based on the meta data
(math types)
//
// now create some data which samples the above functions
// This data is known as a Field, and in this case a FlatField
//
int iNtimes1 = 4;
// time series test
// 2 May 99, 15:51:00
double dStart = new DateTime(1999, 122, 57060).getValue();
Set sl1dsTime = // 4 times: t+0,+1000,+2000,+3000
new Linear1DSet(rttTime, dStart, dStart + 3000.0, iNtimes1);
// now define a dataset which varies with time (with null data
values)
// which has 4 time steps
FlatField ffTime2Temperature = new FlatField(ftTime2Temperature, sl1dsTime);
double dMinTemp = 10.0;
double[][] daaTemperature = {{dMinTemp, dMinTemp + 5.0,
dMinTemp + 10.0,
dMinTemp + 15.0}};
//
// set data values for datasets (FlatFields)
//
ffTime2Temperature.setSamples(daaTemperature);
diDisplay[0].addMap(new ScalarMap(rtTemperature, Display.YAxis));
diDisplay[0].addMap(new ScalarMap(RealType.Time, Display.XAxis));
diDisplay[0].addMap(new ConstantMap(0.1, Display.Green));
diDisplay[0].addMap(new ConstantMap(0.5, Display.Blue));
// diDisplay[0].addMap(new ConstantMap(0.5, Display.Red));
diDisplay[0].addMap(new ScalarMap(rtTemperature, Display.Red));
DataReferenceImpl driTemperatures
new DataReferenceImpl("driTemperatures");
driTemperatures.setData(ffTime2Temperature);
diDisplay[0].addReference(driTemperatures, null);
}
// String getFrameTitle() { return "VisAD Time Series Display"; }
public String toString()
{
return ": Time Series Display of Temperature";
}
public static void main(String[] args)
throws RemoteException, VisADException
{
new TimeSeries(args);
}
}
