duplicates: Determine all duplicate elements
In phytomosaic/ecole: ecole: School of Ecology Package

Description Usage Arguments Details Value See Also Examples

Determines which elements of a vector or data frame are duplicates of other elements, and returns either a logical vector indicating which elements (rows) are duplicates, or the duplicated elements (rows) themselves.

1	duplicates(x, xret = FALSE, ...)

`x`	a vector or a data frame or an array or NULL.
`xret`	logical, default `FALSE` returns a logical vector indicating which rows are duplicates, `TRUE` returns the duplicated elements.
`...`	additional arguments passed to `duplicated`.

Behavior nearly identical to duplicated, except returns ALL duplicated elements, not simply the first.

Numeric vector indexing rows (sample units) in spe1 which are nearest compositional neighbors of spe2. The order corresponds to row order in spe2.

duplicated, and https://stackoverflow.com/questions/7854433/.

x <- c('a','b','c','c','c')
y <- data.frame(x, y=c(1,2,4,4,5))
z <- as.matrix(y)
duplicates(x) # duplicate_s_
duplicated(x) # compare with duplicate_d_
duplicates(y)
duplicated(y)
duplicates(z)
duplicated(z)