tsf_long: tsf_long
In aplantin/pldist: Paired and Longitudinal Ecological Dissimilarities

OTU transformation for longitudinal data. Computes average within-subject change (in presence for qualitative metrics, abundance for quantitative metrics) during one unit of time for each taxon.

1	tsf_long(otu.props, otu.clr, metadata, norm = TRUE)

`otu.props`	Matrix of OTU proportions (rownames = sample IDs, colnames = OTU IDs)
`otu.clr`	Matrix of CLR-transformed OTU proportions (rownames = sample IDs, colnames = OTU IDs)
`metadata`	Data frame with three columns: subject identifiers (n unique values, column name "subjID"), sample identifiers (must match row names of otu.tab, column name "sampID"), and time point or group identifier.
`norm`	Indicator of whether to normalize the difference to average taxon abundance or not (default TRUE)

List with the following elements. Data matrices have subject identifiers as row names and OTU identifiers as column names.

`dat.binary`	n x p matrix of data after longitudinal, binary/qualitative transformation
`dat.quant.prop`	n x p matrix of data after longitudinal, quantitative transformation applied to OTU proportions
`dat.quant.clr`	n x p matrix of data after longitudinal, quantitative transformation applied to CLR-transformed OTU proportions
`avg.prop`	n x p matrix with overall average proportion of each taxon