multMergeHTseq: Combine multiple htseq files using merge
In mzinkgraf/fastOC: Co-expression network analysis across multiple species

Read and combine tab deliminted htseq results files from a folder using the merge function.

1 2	multMergeHTseq(mypath, pattern="*\\.htseq", byY="gene", RegEx="(\\w+)\\.htseq\\.txt", Replace="\\1", sep="\t")

`mypath`	Path to folder.
`pattern`	Unique pattern that matches files to be read and merged using Perl style regular expressions.
`byY`	Column name that should be used in the merge function.
`RegEx`	Perl style regular expression that matches pattern in the filename. Used to extract library name from filename. Example "(\\w+)\\.htseq\\.txt" matches Library1 in filename Library1.htseq.txt
`Replace`	Perl style replacement. Default = "\\1"
`sep`	The field separator character.