multiple_rrarefy: Performs rarefying multiple times and returns averaged OTU...
In cpauvert/psadd: Additions to phyloseq package for microbiome analysis

Performs rarefying multiple times and returns averaged OTU table

1 2	multiple_rrarefy(physeq, sample.size = min(sample_sums(physeq)), n, start.seed)

`physeq`	(Required). A `phyloseq-class` object that you want to trim/filter.
`sample.size`	(Optional). A single integer value equal to the number of reads being simulated, also known as the depth, and also equal to each value returned by `sample_sums` on the output.
`n`	The number of times to perform rarefying of OTU table
`start.seed`	Random seed to start, it will be incremented up to `start.seed+n`