INTRODUCTION TO THE EXAMPLES The following sections how the software can be used on several toy problems. These examples are meant to illustrate the features of the software. You should note that the models and Markov chain methods used are not necessarily appropriate for other problems. To gain a full understanding of the various possibilities, and their advantages and disadvantages, you will need to read both the general references given earlier for these models, and the detailed documentation on the various commands. The output shown for these examples was obtained by running the software on our machine, with ">" at the start of a line indicating a command line that was input. It is possible (even likely) that your results will differ, even if you have installed the software correctly, since small differences in floating point arithmetic can be magnified into large differences in the course of the simulation. However, unless one of the simulations became stuck in an isolated local mode, the final predictions you obtain (eg, from 'net-pred' or 'gp-pred'), and the final distributions of model parameters, should be close to those reported below. Some of the examples show the example of "xxx-plt" commands being piped into a program called "plot". Any plot program could be used that reads pairs of numbers from standard input and plots them (in some cases, a blank line is present to indicate the start of a new sub-plot). I use the "xgraph" program written by David Harrison, which can be obtained from my web page. If you don't have a plot program that can be used in this convenient fashion, you can redirect the output to a file (eg, "net-plt t l log >file") and then read this file into whatever plotting program you have. As a last resort, you can also just look at the numbers in the file yourself. All the data sets mentioned here are present in directories with names beginning with "ex", along with the C source of the programs that generated the data. The commands given assume that you are in the directory containing the data. The command sequences used for each example are also stored in these directories, in shell files with the names like 'rcmds.net', 'rcmds.gp', 'bcmds.net', 'bcmds.gp', etc. Computation times are given for many of the examples. These are all for the current version of the software, run on our computer, which is an SGI machine with 194 MHz MIPS R10000 processors.