tax2newick: convert NCBI taxonomy sub trees to newick format
In raim/ncbitax: Simple base R parser for NCBI Taxonomy

convert NCBI taxonomy sub trees to newick format

1 2	tax2newick(ids, tax, names = FALSE, full = FALSE, ranks = FALSE, verb = FALSE, dbug = FALSE)

`ids`	vector of taxon IDs
`tax`	NCBI taxonomy object
`names`	replace taxon IDs with names
`full`	if `TRUE` `singleton` nodes with only one child will NOT be collapsed
`ranks`	add rank information for nodes
`verb`	print progress messages
`dbug`	print debug messages