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Tracer 1.5

A program for analyzing the trace files generated by Bayesian MCMC runs


Last Week downloads: 0
Total downloads: 340
  • Last Updated: Mar 26, 2012
  • License: Freeware Free
  • OS: Windows 8/7/Vista/XP
  • Requirements: No special requirements

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4 out of 5 based on 1 ratings for Tracer 1.5

For Tracer 1.5Publisher's description


Tracer is a Photo & Image software developed by Andrew Rambaut. After our trial and test, the software is proved to be official, secure and free. Here is the official description for Tracer:

BS Editor: Tracer was developed to be a program for analyzing the trace files generated by Bayesian MCMC runs (that is, the continuous parameter values sampled from the chain). It can be used to analyse runs of BEAST, MrBayes, LAMARC and possibly other MCMC programs.

There are 4 Analysis tabs to choose from:
Estimates - this shows the mean, stdev, confidence intervals and other statistics about the selected parameter. A Frequency distribution will also be plotted.

Density - this shows the Bayesian posterior density plot for the selected parameter.

Joint-Marginal - this only appears if exactly 2 parameters are chosen (HOLD down shift to select multiple parameters). It then plots one against the other to look at their joint-marginal distribution.

Trace - this shows the trace of the parameter against state or generation number. Use this to check mixing, choose a suitable burn-in and look for trends that might suggest problems with convergence

Multiple parameters can be selected by holding down the shift key. This will overlay the plots for the different parameters allowing comparisons to be made. You can also select multiple trace files as well to compare different runs. If multiple trace files have the same trace names then a "Combined" trace will automatically appear. This can be selected as well as the individual trace files.

You can also select the "Demographic Analysis" from the Analysis menu - This plots the distribution of demographic population sizes over time for a number of models (constant size, exponential growth & logistic growth) that are available in BEAST. This involves you selecting the traces for each parameter of the model. You should only select the model that was actually run under BEAST (e.g., if you ran an exponential growth model, you shouldn't plot the constant population size model).

The "Analysis" menu also contains options for performing Bayesian Skyline reconstructions an
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