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DBshow - Online in the Cloud

Run DBshow in OnWorks free hosting provider over Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

This is the command DBshow that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator



DBshow - display reads stored in a Dazzler database


DBshow [-unqUQ] [-wint(80)] [-mtrack]+ path:db|dam [ reads:FILE | reads:range ... ]


Displays the requested reads in the database path.db or path.dam. By default the command
applies to the trimmed database, but if -u is set then the entire DB is used. If no read
arguments are given then every read in the database or database block is displayed.
Otherwise the input file or the list of supplied integer ranges give the ordinal positions
in the actively loaded portion of the db. In the case of a file, it should simply contain
a read index, one per line. In the other case, a read range is either a lone integer or
the symbol $, in which case the read range consists of just that read (the last read in
the database if $). One may also give two positive integers separated by a dash to
indicate a range of integers, where again a $ represents the index of the last read in the
actively loaded db. For example, 1 3-5 $ displays reads 1, 3, 4, 5, and the last read in
the active db. As another example, 1-$ displays every read in the active db (the

By default a .fasta file of the read sequences is displayed. If the -q option is set,
then the QV streams are also displayed in a non-standard modification of the fasta format.
If the -n option is set then the DNA sequence is not displayed. If the -Q option is set
then a .quiva file is displayed and in this case the -n and -m options may not be set (and
the -q and -w options have no effect).

If one or more masks are set with the -m option then the track intervals are also
displayed in an additional header line and the bases within an interval are displayed in
the case opposite that used for all the other bases. By default the output sequences are
in lower case and 80 chars per line. The -U option specifies upper case should be used,
and the characters per line, or line width, can be set to any positive value with the -w

The .fasta or .quiva files that are output can be converted into a DB by fasta2DB(1) and
quiva2DB(1) (if the -q and -n options are not set and no -m options are set), giving one a
simple way to make a DB of a subset of the reads for testing purposes.

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