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Spectrum 2.3.0

Read in a data file comprising aligned character arrays

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Last Week downloads: 0
Total downloads: 277
  • 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 Spectrum 2.3.0

For Spectrum 2.3.0Publisher's description

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

BS Editor: The Spectrum application was developed to be a small program that will allow you to read in a data file comprising aligned character arrays (such as DNA sequence data) or distance data in the form of a matrix, and perform some simple spectral Analysis procedures on that data.

Spectral analysis is a wonderful tool for visualising phylogenetic information without forcing it into a tree - this has the advantage of avoiding (1) the difficulty of choosing which is the "best" method for tree Reconstruction, and (2) the whole issue of whether the data is tree-like.

The program reads in phylogenetic 4-state or binary data, or distance data, and outputs the bipartition Spectra corresponding to the data. It can also be used it to find the tree whose expected spectrum is closest to your observed spectrum.

A spectrum is a representation of all the inferred or estimated branch lengths of a phylogenetic tree, without the necessity of actually inferring a tree. For "good" data, that is, data which corresponds exactly to a particular phylogenetic tree without any conflict, the spectrum will show positive values only when they correspond to branches of that tree, and all the others will be zero. With n taxa and a fully resolved Unrooted tree, this amounts to (2n-3) branches, n of which are pendant (often called 'leaves') and the other (n-3) of which are internal.

With n taxa there are 2(n-1) ways of splitting the taxa into two parts, which are frequently called splits. These are all potential branches of phylogenetic trees, from which we must select a set (or sets) of splits to construct estimates of the real phylogenetic tree underlying the taxa. You are urged to read the 'Technical bits', next.
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Please be aware that Brothersoft do not supply any crack, patches, serial numbers or keygen for Spectrum,and please consult directly with program authors for any problem with Spectrum.