vegtable (version 0.1.3)

veg_relation: Retrieve or replace relations in vegtable objects.

Description

Tables providing information about levels of categorical variables in the header of a ‘Turboveg’ database are called 'popups' in ‘Turboveg’, but 'relations' in vegtable. Such variables will be converted into factors in the slot 'header' according to the levels and their sorting in the respective relation.

Usage

# S4 method for vegtable,character
veg_relation(vegtable, relation,
	match_header=FALSE, ...)
veg_relation(vegtable, relation) <- value

Arguments

vegtable

An object of class '>vegtable.

relation

A character value indicating the veg_relation to be retrieved or replaced.

match_header

A logical vector, whether only levels occurring in slot 'header' should be considered or all.

value

A data frame containing the new veg_relation.

...

Further arguments to be passed among methods.

Value

This function retrieves and object of class 'data.frame'. In the replacement method, an object of class '>vegtable including 'value' in the slot 'relations'.

Examples

# NOT RUN {
library(vegtable)
data(Kenya_veg)

## overview of references
veg_relation(Kenya_veg, "REFERENCE")
# }