Marking networks change formats

Source: R/mark_changes.R

These functions implement logical tests for various network properties. All is_*() functions return a logical scalar (TRUE or FALSE).

  • is_longitudinal() marks networks TRUE if they are panels, i.e. if each moment they record re-observes the whole network.

  • is_dynamic() marks networks TRUE if they record a stream of events, either as increments to the ties or as the interval each tie lasts over.

A network records time in one way or the other, so the two marks do not overlap. See the Time section of to_time() for what separates them.

  • is_changing() marks networks TRUE if they contain any nodal changes.

is_longitudinal(.data)

is_dynamic(.data)

is_changing(.data)

Arguments

.data

An object of a {manynet}-consistent class:

  • adjacency or incidence matrix from {base} R

  • edgelist data.frame from {base} R or tbl/tbl_df from {tibble}

  • stocnet stocnet, from the {manynet} package

  • igraph igraph, from the {igraph} package

  • network network, from the {network} package

  • tidygraph tbl_graph, from the {tidygraph} package

Details

Not all functions have methods available for all object classes. Below are the currently implemented S3 methods for these functions:

                default diff_model igraph list stocnet
is_changing           *          *      *            *
is_dynamic            *                 *            *
is_longitudinal       *                 *    *       *

If a method is not available for a particular class, but a default method is, the default method will attempt to coerce the object to a class for which a method is defined, and then coerce the output back to the original class. If no method is available for any class, an error will be thrown.

See also

Other marks: mark_format_cognitive, mark_format_node, mark_format_tie

Other changes: manip_changes

Examples

is_longitudinal(create_tree(5, 3))
#> [1] FALSE
is_dynamic(create_tree(3))
#> [1] FALSE
is_changing(fict_starwars)
#> [1] TRUE