nvertices function

Count the number of vertices/edges/slices in a graph

nvertices(graph)

nnodes(graph)

nedges(graph)

nlinks(graph)

nslices(graph)

Arguments

• graph: Any class of accepted graph format (see netdiffuseR-graphs).

Returns

For nvertices and nslices, an integer scalar equal to the number of vertices and slices in the graph. Otherwise, from nedges, either a list of size $t$ with the counts of edges (non-zero elements in the adjacency matrices) at each time period, or, when graph is static, a single scalar with such number.

Details

nnodes and nlinks are just aliases for nvertices and nedges respectively.

Examples

# Creating a dynamic graph (we will use this for all the classes) -----------
set.seed(13133)
diffnet <- rdiffnet(100, 4)

# Lets use the first time period as a static graph
graph_mat <- diffnet$graph[[1]]
graph_dgCMatrix <- methods::as(graph_mat, "dgCMatrix")

# Now lets generate the other dynamic graphs
graph_list  <- diffnet$graph
graph_array <- as.array(diffnet) # using the as.array method for diffnet objects

# Now we can compare vertices counts
nvertices(diffnet)
nvertices(graph_list)
nvertices(graph_array)

nvertices(graph_mat)
nvertices(graph_dgCMatrix)

# ... and edges count
nedges(diffnet)
nedges(graph_list)
nedges(graph_array)

nedges(graph_mat)
nedges(graph_dgCMatrix)