layer: Return Stratum/Layer
In vegsoup: Classes and Methods for Phytosociology

Description Usage Arguments Details Value Note Author(s) See Also Examples

Simply return the layer for each observation in slot species.

## S4 method for signature 'Vegsoup'
layer(obj, ...)
## S4 method for signature 'Vegsoup'
layernumber(obj, ...)

`obj`	`Vegsoup*` object
`...`	passed from to methods.

Method layer simply returns the layer for each observation, equivalent to species(obj)$layer. layernumber returns layer assignments as an ordered integer.

layer and layernumber return a vector equal in length to nrow(species(obj)).

The function will be renamed to avoid typos with method layers or even dropped – it is not very useful and simple minded?

Roland Kaiser

layers, Vegsoup

data(barmstein)
x <- barmstein

# check the number of occurences per layer
table(layer(x))

# alternative
table(species(x)$layer)

# layer as integer
layernumber(x)