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#' qiimer: Read QIIME output files and create plots
#'
#' @name qiimer
#' @docType package
#' @import grDevices
#' @import pheatmap
#' @import stats
#' @import utils
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#' Sample dataset from murine gut microbiome
#'
#' The \code{relmbeta} dataset is taken from a mouse study where wild-type
#' and RELMbeta knockout mice were fed either a normal or high-fat diet.
#' The diet was observed to have a pronounced effect on the gut microbiome
#' composition. The genotype also had an effect, but less so.
#'
#' The bacterial 16S rDNA gene was sequenced using 454 FLX technology,
#' producing about 26k reads. The reads were processed via the standard QIIME
#' workflow, \code{pick_de_novo_otus.py}, which clustered the reads into 776
#' operational taxonomic units (OTUs). QIIME version 1.7.0 was used for the
#' analysis.
#'
#' The OTU table was filtered to remove OTUs appearing in only one sample.
#' Following this, a single rarefaction was performed at a level of 500 reads
#' per sample. The unweighted UniFrac distance was then computed for each pair
#' of samples.
#'
#' The \code{relmbeta} data frame lists the sample IDs, genotypes, and dietary
#' assignments for the mice.
#'
#' @name relmbeta
#' @docType data
#' @keywords datasets
#' @format A data frame with 20 rows and 3 columns.
#' @source Hildebrandt et al. High-fat diet determines the composition of the
#' murine gut microbiome independently of obesity. \emph{Gastroenterology}
#' \strong{137}, 1716 (2009).
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#' OTU counts from murine gut microbiome
#'
#' The matrix \code{relmbeta_counts} contains the number of reads
#' observed in each OTU, after rarefaction to 500 reads per sample.
#' OTUs are listed in the rows and samples are listed in the columns.
#'
#' The \code{\link{relmbeta}} documentation provides an overview of the study.
#'
#' @name relmbeta_counts
#' @docType data
#' @keywords datasets
#' @format An integer matrix with 337 rows and 20 columns.
#' @seealso \code{\link{relmbeta}}
#' @source Hildebrandt et al. High-fat diet determines the composition of the
#' murine gut microbiome independently of obesity. \emph{Gastroenterology}
#' \strong{137}, 1716 (2009).
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#' Unweighted UniFrac distances from murine gut microbiome
#'
#' \code{relmbeta_dist} is an object of class \code{"dist"}, containing
#' the unweighted UniFrac distances between samples.
#'
#' The \code{\link{relmbeta}} documentation provides an overview of the study.
#'
#' @name relmbeta_dist
#' @docType data
#' @keywords datasets
#' @format An object of class \code{"dist"}.
#' @seealso \code{\link{relmbeta}}
#' @source Hildebrandt et al. High-fat diet determines the composition of the
#' murine gut microbiome independently of obesity. \emph{Gastroenterology}
#' \strong{137}, 1716 (2009).
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#' Shannon diversity measurements from murine gut microbiome
#'
#' \code{relmbeta_alpha} is a data frame containing Shannon diversity
#' (base 2) at a level of 10-500 sequences per sample.
#'
#' The \code{\link{relmbeta}} documentation provides an overview of the study.
#'
#' @name relmbeta_alpha
#' @docType data
#' @keywords datasets
#' @format A data frame with 2200 rows and 4 columns.
#' @seealso \code{\link{relmbeta}}
#' @source Hildebrandt et al. High-fat diet determines the composition of the
#' murine gut microbiome independently of obesity. \emph{Gastroenterology}
#' \strong{137}, 1716 (2009).
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#' Taxonomic assignments from murine gut microbiome
#'
#' The character vector \code{relmbeta_assignments} contains taxonomic
#' assignments for each OTU in the study.
#'
#' The \code{\link{relmbeta}} documentation provides an overview of the study.
#'
#' @name relmbeta_assignments
#' @docType data
#' @keywords datasets
#' @format A character vector with 337 elements.
#' @seealso \code{\link{relmbeta}}
#' @source Hildebrandt et al. High-fat diet determines the composition of the
#' murine gut microbiome independently of obesity. \emph{Gastroenterology}
#' \strong{137}, 1716 (2009).
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#' BIOM format object from murine gut microbiome
#'
#' The \code{relmbeta_biom} object is a representation of the BIOM file
#' produced by QIIME. It was produced by loading the BIOM file with the
#' function \code{RJSONIO::fromJSON}.
#'
#' The \code{\link{relmbeta}} documentation provides an overview of the study.
#'
#' @name relmbeta_biom
#' @docType data
#' @keywords datasets
#' @format A \code{"biom"} object with 227 rows and 20 columns.
#' @seealso \code{\link{relmbeta}}
#' @source Hildebrandt et al. High-fat diet determines the composition of the
#' murine gut microbiome independently of obesity. \emph{Gastroenterology}
#' \strong{137}, 1716 (2009).
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