mashtree

Create a tree using Mash distances.

For simple usage, see mashtree.pl. For advanced options, look at mashtree_wrapper.pl.

Examples

mashtree.pl --numcpus 12 *.fastq.gz [*.fasta] > mashtree.dnd

Note: fastq files are interpreted as raw read files. Fasta, GenBank, and EMBL files are interpreted as genome assemblies.

Note: Compressed files are also accepted of any of the above file types. You can compress with gz, bz2, or zip.

Advanced

mashtree_wrapper.pl --reps 100 -- --numcpus 12 *.fastq.gz > mashtree.dnd

Usage

Usage: mashtree.pl [options] *.fastq *.fasta *.gbk *.msh > tree.dnd
NOTE: fastq files are read as raw reads;
      fasta, gbk, and embl files are read as assemblies;
      Input files can be gzipped.
--tempdir            ''   If specified, this directory will not be
                          removed at the end of the script and can
                          be used to cache results for future
                          analyses.
                          If not specified, a dir will be made for you
                          and then deleted at the end of this script.
--numcpus            1    This script uses Perl threads.
--outmatrix          ''   If specified, will write a distance matrix
                          in tab-delimited format
--version                 Display the version and exit

TREE OPTIONS
--truncLength        250  How many characters to keep in a filename
--sort-order         ABC  For neighbor-joining, the sort order can
                          make a difference. Options include:
                          ABC (alphabetical), random, input-order

MASH SKETCH OPTIONS
--genomesize         5000000
--mindepth           5    If mindepth is zero, then it will be
                          chosen in a smart but slower method,
                          to discard lower-abundance kmers.
--kmerlength         21
--sketch-size        10000

Also see mashtree_wrapper.pl for advanced usage. Run either script with --help for additional information.

Requirements

• Mash >= v1.1
• SQLite3
• Perl
  • multithreading
  • BioPerl library
  • DBD::SQLite

Installation

Installation from Git

After downloading the latest release, go into the directory and run make

$ cd mashtree
$ perl Makefile.PL 
$ make test

Add mashtree/bin to PATH and you're good to go!

Installation from CPAN

Installing from CPAN installs the latest stable version of Mashtree. This method should add the Mashtree perl modules to the correct place in your home directory and should add the executables to your local bin directory. However, I am new to CPAN, so please give me feedback via the issues tab if this is not correct.

$ cpanm -L ~ Mashtree
$ export PERL5LIB=$PERL5LIB:$HOME/lib/perl5
$ mashtree.pl --help # verify it shows usage and not an error

Alternate method of installing from CPAN

$ cpan # initiates the CPAN command line prompt
cpan[1]> install Mashtree
cpan[2]> exit
$ export PERL5LIB=$PERL5LIB:$HOME/lib/perl5
$ mashtree.pl --help # verify it shows usage and not an error

Uninstallation from CPAN

I'm not sure why you'd want to uninstall Mashtree but here is how you would clean it up.

$ cpanm --uninstall Mashtree --local-lib=$HOME

References

• Mash: http://mash.readthedocs.io
• BioPerl: http://bioperl.org

GitHub stickers for Mashtree