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Review of Visualisation Systems

2.3 IBM Data Explorer

2.3.1 - Starting up the system
2.3.2 - Building a Network
2.3.3 - Running Example Programs
2.3.4 - Data Input
2.3.5 - Finishing off
A good way to start with Data Explorer (known as dx) is to follow the tutorial described in Appendix A of the User Guide [26].

The tutorial is in a number of separate parts - each can be followed independently of the others. It makes use of some files which should have been installed with the system. If these cannot be found, it is possible that the path names are different on your system - consult your system manager.

2.3.1 Starting up the system

At the UNIX prompt, type


You should see the message below as dx is started:

Starting DX user interface

2.3.2 Building a Network

Appendix A.2 in the User Guide contains a tutorial which shows how to construct a simple network that reads in data, generates an isosurface, and displays it. It also shows how to save the network to file, and deals with the control of parameters (in this case the isolevel).

One thing it does not tell you is how to correct an error in wiring up the network: to remove a connection, click on the destination port and drag away the connection before releasing the mouse button. Figure 2 shows the construction of a simple network.

2.3.3 Running Example Programs

Appendix A.1 reads a previously defined network from disk, and explains how to execute it.

2.3.4 Data Input

There is no tutorial on data input and so the new user must refer to the appropriate manual pages. Chapter 4 of the User Guide deals with data import - it is well provided with examples in increasing order of complexity.

2.3.5 Finishing off

To leave dx, click on "File" on the menu bar of the VPE (the Visual Programming Environment) window and select "Quit".

Review of Visualisation Systems
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