size.intact.to.sink {streamDAG}

Size of intact network that feeds into the sink or a particular node

Description

The length of the subgraph network that ends (feeds into) a particular node, e.g., the sink. For a weighted graph, the sum of the weights of the subgraph are given. Thus, if weights are stream lengths the function will give the stream length of the portion of the intact stream network that feeds into a particular node.

Usage

size.intact.to.sink(G, sink = NULL)

size.intact.to.node(G, node = NULL)

Arguments

G

A graph object of class "igraph", see graph_from_literal

sink

The sink node of G.

node

A node of interest.

Value

Returns the size of the graph or subgraph that includes a node of interest.

Author(s)

Ken Aho, Gabor Csardi wrote several important function components including subgraph.

Examples

# Murphy Cr. data, no arc from M1799 to M1719
G <- graph_from_literal(IN_N --+ M1984 --+ M1909, IN_S --+ M1993 --+ M1951, 
M1951 --+ M1909 --+ M1799, M1719 --+ M1653 --+ M1572 --+ M1452 --+ M1377, 
M1377 --+ M1254 --+ M1166 --+ M1121 --+ M1036 --+ M918 --+ M823 --+ M759, 
M759 --+ M716 --+ M624 --+ M523 --+ M454 --+ M380 --+ M233 --+ M153 --+ M91, 
M91 --+ OUT)

data(mur_coords) # coordinate data
spatial.plot(G, mur_coords[,2], mur_coords[,3], names =  mur_coords[,1])

data(mur_lengths) # segment length data 

lengths_new <- mur_lengths[-7,] # Drop M1799 -> M1719 arc length
E(G)$weight <- lengths_new[,2]
size.intact.to.sink(G, sink = "OUT")
size.intact.to.node(G, node = "OUT")