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PROGRAM:
NAME
andi - estimates evolutionary distance
SYNOPSIS
andi [-jlv] [-b INT] [-p FLOAT] [-m MODEL] [-t INT] FILES...
DESCRIPTION
andi estimates the evolutionary distance between closely related genomes. For this andi
reads the input sequences from FASTA files and computes the pairwise anchor distance. The
idea behind this is explained in a paper by Haubold et al. (see below).
OUTPUT
The output is a symmetrical distance matrix in PHYLIP format, with each entry representing
divergence with a positive real number. A distance of zero means that two sequences are
identical, whereas other values are estimates for the nucleotide substitution rate (Jukes-
Cantor corrected). For technical reasons the comparison might fail and no estimate can be
computed. In such cases nan is printed. This either means that the input sequences were
too short (<200bp) or too diverse (K>0.5) for our method to work properly.
OPTIONS
-b, --bootstrap <INT>
Compute multiple distance matrices, with n-1 bootstrapped from the first. See the
paper Klötzl & Haubold (2016, in review) for a detailed explanation.
-j, --join
Use this mode if each of your FASTA files represents one assembly with numerous
contigs. andi will then treat all of the contained sequences per file as a single
genome. In this mode at least one filename must be provided via command line
arguments. For the output the filename is used to identify each sequence.
-l, --low-memory
In multithreaded mode, andi requires memory linear to the amount of threads. The
low memory mode changes this to a constant demand independent from the used number
of threads. Unfortunately, this comes at a significant runtime cost.
-m, --model <Raw|JC|Kimura>
Different models of nucleotide evolution are supported. By default the Jukes-Cantor
correction is used.
-p <FLOAT>
Significance of an anchor pair; default: 0.05.
-t <INT>
The number of threads to be used; by default, all available processors are used.
Multithreading is only available if andi was compiled with OpenMP support.
-v, --verbose
Prints additional information. Apply multiple times for extra verboseness.
-h, --help
Prints the synopsis and an explanation of available options.
--version
Outputs version information and acknowledgments.
COPYRIGHT
Copyright © 2014, 2015 Fabian Klötzl License GPLv3+: GNU GPL version 3 or later.
This is free software: you are free to change and redistribute it. There is NO WARRANTY,
to the extent permitted by law. The full license text is available at
<http://gnu.org/licenses/gpl.html>.
ACKNOWLEDGMENTS
1) andi: Haubold, B. Klötzl, F. and Pfaffelhuber, P. (2015). andi: Fast and accurate
estimation of evolutionary distances between closely related genomes
2) Algorithms: Ohlebusch, E. (2013). Bioinformatics Algorithms. Sequence Analysis, Genome
Rearrangements, and Phylogenetic Reconstruction. pp 118f.
3) SA construction: Mori, Y. (2005). Short description of improved two-stage suffix
sorting algorithm. http://homepage3.nifty.com/wpage/software/itssort.txt
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