labdsv (version 1.8-0)

dematrify: Create Three Column Database Form Data Frame from Sparse Data Frames

Description

Takes a sparse matrix data frame (typical of ecological abundance data) and converts it into three column database format.

Usage

dematrify(taxa, filename, sep = ",", thresh = 0)

Arguments

taxa

a sparse data.frame or matrix, with samples as rows and taxa as columns

filename

the name of the filename to produce

sep

the separator to use in separating columns

thresh

the minimum abundance to be included in the output

Value

a data.frame with the first column the sample ID, the second column the taxon ID, and the third column the abundance.

Details

The routine is pure R code to convert data from sparse matrix form to three column database form for export or reduced storage

See Also

matrify

Examples

# NOT RUN {
   library(labdsv)
   data(bryceveg)
   x <- dematrify(bryceveg)
# }