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Langue: en

Version: noviembre 23, 2004 (debian - 07/07/09)

Section: 1 (Commandes utilisateur)


avida - Auto-adaptive genetic system for Artificial Life research




This is the graphical viewer for the Avida auto-adaptive genetic system.

The Avida system is based on concepts similar to those employed by the tierra program developed by Tom Ray. In lay terms, Avida is a digital world in which simple computer programs mutate and evolve. More technically, it is a population of self-reproducing strings with a Turing-complete genetic basis subjected to Poisson-random mutations. The population adapts to the combination of an intrinsic fitness landscape (self-reproduction) and an externally imposed (extrinsic) fitness function provided by the researcher.

By studying this system, one can examine evolutionary adaptation, general traits of living systems (such as self-organization), and other issues pertaining to theoretical or evolutionary biology and dynamic systems. The power of Avida is that it gives us a controllable digital system in which to study the theories of evolutionary biology. Often, we can study elements of evolutionary theory that are difficult or impossible in biological systems.


Make a new working directory for the experiment you want to run, and put the starting data in it. You can copy standard starting data and modify it with:

cp /usr/share/avida/* . -r

You can run the program from inside that directory, or select your working directory once started.


Avida is a joint project of the Digital Life Laboratory, headed by Chris Adami, at the California Institute of Technology ( and Richard Lenski's Microbial Evolution laboratory at Michigan State university ( For more info on these groups or their research, please visit the links above.

This manual page was written by Miriam Ruiz <>, for the Debian project (but may be used by others).


There is a directory with some starting data you can use as a base for your research in /usr/share/doc/alive/data/. You just have to copy the contents of that directory wherever you want and start running avida-viewer there. You can find HTML documentation about avida in /usr/share/doc/alive/html/.
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soumettre un problème :
Un bateau vogue sur l'Océan. Il a quitté Boston avec un chargement de
laine. Il jauge 200 tonneaux. Il se dirige vers le Havre. Le grand mat
est cassé, le garçon de cabine est sur le pont, il y a douze passagers
à bord. Le vent souffle E.N.-E. L'horloge marque 3 h 1/4. On est au mois
de mai. Quel est l'âge du capitaine ?
-+- Gustave Flaubert, lettre à sa soeur Caroline 1843 -+-