make_cr_graph {archeofrag}

Make a "connection" relationships graph.

Description

Takes a frag.object and returns an undirected graph representing the "connection" relationships between archaeological fragments. A "connection" relationship refers to a physical connection between two fragments that were part of the same object.

Usage

make_cr_graph(object)

Arguments

object

A frag.object object.

Details

Returns an undirected graph of "igraph" class. The "fragments" data frame of the frag.object is used to set the vertices attributes.

Value

An undirected igraph class graph. The "frag_type" graph attribute is set with the "connection" character value.

Author(s)

Sebastien Plutniak <sebastien.plutniak at posteo.net>

See Also

make_frag_object

Examples

cr.df <- matrix(c(1,2, 1,3, 2,3, 4,5, 4,6, 7,8), ncol=2, byrow=TRUE)
sr.df <- matrix( c(1,1, 9,1, 10,1, 11,2, 12,2, 13,2), ncol=2, byrow=TRUE)
fragments.df <- data.frame(1:13, letters[1:13]) 

cr_g <- make_frag_object(cr=cr.df, fragments=fragments.df)
crsr_g <- make_frag_object(cr=cr.df, sr=sr.df, fragments=fragments.df)

make_cr_graph(cr_g)
make_cr_graph(crsr_g)