union

Function

Description

union reads in several sequences, concatenates them and writes them out as a single sequence. The input is typically a list file containing references to multiple sequences or subsequences (regions of a sequence). Optionally, feature information will be used.

Usage

Command line arguments

Input file format

The input can be any set of sequences in a file of multiple sequence entries or in a List file. The sequences are concatenated in the order in which they appear in the file.

You may find the program yank useful for creating List files.

Output file format

The result is a normal sequence file containing a single sequence resulting from the concatenation of the input sequences.

Data files

None.

Notes

union is most useful when the input sequences are specified in a "list file". A list file contain references to any number of sequences which are retrieved from some other file or database. Each sequence reference is a Uniform Sequence Address (USA) which can include the specification of sub-regions of the sequence, eg. em:x65923[20:55]). Specifying several such subregions in a sequence or sequences allows you to enter disjoint sequences to be joined.

References

None.

Warnings

None.

Diagnostic Error Messages

None.

Exit status

It always exits with status 0.

Known bugs

None.

You may find the program yank useful for creating List files.

Author(s)

History

Target users

Comments