Changes in version 1.0.12.9000                     

                 Changes in version 1.0.12 (2026-04-27)                 

  - The minimum R version is now 4.1 to reflect usage of the native pipe
    operator |>.

  - Fixed get_leverage_centrality() which erroneously passed the full
    degree vector instead of a single vertex index to
    igraph::neighbors() (#541).

  - Fixed get_authority_centrality() and get_eigenvector_centrality() to
    safely call igraph::hits_scores() and handle the igraph v2+
    authority/hub API (#542).

  - Fixed GML import to correctly apply edge labels (#543).

  - Fixed grViz() to correctly pass options to Viz() (@cderv, #530).

  - Fixed edge attribute generation logic when edge attributes are empty
    strings (#521).

  - Migrated all examples and internal code from %>% to the native pipe
    |> (#540).

                 Changes in version 1.0.11 (2024-02-02)                 

  - DiagrammeR now has a dependency on viridisLite instead of viridis
    (@olivroy, #511)

  - DiagrammeR nows uses testthat 3rd edition (@olivroy, #498)

  - No longer use deprecated features from tibble, igraph and tidyselect
    (>= 1.2.0) (@olivroy, #497, #507)

  - Error messages have been reviewed and now use cli (@olivroy, #499,
    #502)

  - It is now easier to install suggested packages on the fly.
    DiagrammeR now uses rlang::check_installed() internally. (@olivroy,
    #499)

  - DiagrammeR() checks the type argument more strictly. (@olivroy,
    #506)

  - DiagrammeR is compatible with igraph (>= 2.0.0) (@maelle, #500)

                 Changes in version 1.0.10 (2023-05-18)                 

  - Remove dependency on the influenceR package, which also means
    removing the get_constraint() and get_bridging() graph inspection
    functions. (#486)

                 Changes in version 1.0.9 (2022-03-05)                  

  - More safely check inputs to grViz() and mermaid()

                 Changes in version 1.0.8 (2022-01-24)                  

  - Reduce minimum R version requirement.

                 Changes in version 1.0.7 (2022-01-15)                  

  - Fix malformed CSS selector in htmlwidgets/grViz.js

  - Fixes for dev tidyr. Only call replace_na(replace = "") on character
    columns. (@DavisVaughan, #448)

  - Added the envir argument to the grViz() and replace_in_spec()
    functions. (@atusy, #408)

                Changes in version 1.0.6.1 (2020-05-08)                 

  - Removed the set_df_as_node_attr(), set_df_as_edge_attr(), and
    get_attr_dfs() functions.

                 Changes in version 1.0.5 (2020-01-16)                  

  - Removes the ability to save a DiagrammeR graph object as a Gephi
    file (.gexf) since the rgexf package is no longer maintained.

                 Changes in version 1.0.0 (2018-03-01)                  

  - Added the helper functions node_aes(), node_data(), edge_aes(), and
    edge_data() to facilitate the binding of node and edge aesthetic and
    data attribute values; several functions now have namesake arguments
    that accept these functions' output.

  - Added traversal functions trav_in_until() and trav_out_until().

  - Information about the graph is now displayed in the console when the
    graph object is called

  - Error messages are now more helpful and try to provide pointers for
    the more common errors.

Deprecated

  - create_complement_graph() is deprecated in favor of create_graph() +
    transform_to_complement_graph().

  - create_subgraph_ws() is deprecated in favor of create_graph() +
    transform_to_subgraph_ws().

  - edge_rel() is deprecated in favor of graph$edges_df$rel for edge
    relationships.

  - create_random_graph() is deprecated in favor of create_graph() +
    add_gnm_graph(), add_growing_graph(), add_islands_graph(),
    add_smallworld_graph() for the creation of randomized graphs.

Functions renamed: (old functions were removed)

  - add_to_series() -> add_graph_to_graph_series()
  - remove_from_series() -> remove_graph_from_graph_series()
  - get_graph_from_series() -> get_graph_from_graph_series()
  - create_series() -> create_graph_series()
  - subset_series() -> filter_graph_series()
  - render_graph_from_series() -> render_graph_from_graph_series()
  - series_info() -> get_graph_series_info()
  - graph_count() -> count_graphs_in_graph_series()
  - graph_info() -> get_graph_info()
  - node_present() -> is_node_present()
  - edge_present() -> is_edge_present()
  - edge_count() -> count_edges()
  - node_count() -> count_nodes()
  - edge_info() -> get_edge_info()
  - node_info() -> get_node_info()
  - node_type() -> get_node_attrs()
  - get_global_graph_attrs() -> get_global_graph_attr_info()
  - get_min_spanning_tree() -> transform_to_min_spanning_tree()

Functions removed:

cache_edge_attrs(), cache_edge_attrs_ws(), cache_edge_count_ws(),
cache_node_attrs(), cache_node_attrs_ws(), cache_node_count_ws(),
clear_global_graph_attrs(), image_icon(), set_global_graph_attrs().

Functions added

add_node_clones_ws(), count_loop_edges(), count_s_connected_cmpts(),
count_unconnected_nodes(), count_w_connected_cmpts(), delete_cache(),
delete_loop_edges_ws(), deselect_edges(), deselect_nodes(),
fully_connect_nodes_ws(), fully_disconnect_nodes_ws(), get_edge_df_ws(),
get_node_df_ws(), is_graph_undirected(), set_graph_directed(),
set_edge_attr_to_display()

                 Changes in version 0.9.2 (2017-09-06)                  

  - Added functions to generate 2D and 3D grid graphs (add_grid_2d() and
    add_grid_3d())

  - Added _ws() (with selection) variants of the
    mutate_[node/edge]_attrs() functions for mutating node or edge
    attributes for only those nodes/edges in an active selection

  - Incorporated an edges argument into the select_edges() function in
    order to filter the selection of edges to a set of edge ID values

  - Reduced the dependency on R to version >= 3.2.0

                 Changes in version 0.9.1 (2017-08-21)                  

  - Simplified many functions internally

  - Added a default print method for graph objects

  - Allowed use of bare node or edge attribute names in many functions

  - Implemented graph actions as a means to run one or more functions at
    every graph transformation step; for example, this can be used to
    automatically update a node attribute such as betweenness whenever
    modifications to the graph are made (e.g., adding nodes, removing
    edges, etc.)

  - Data frames can be set as node or edge attributes with the
    set_df_as_node_attr() and set_df_as_edge_attr() functions; the
    get_attr_dfs() function allows for retrieval of stored data frame
    data

  - Added two new graph-generating functions (add_gnp_graph(),
    add_pa_graph(), and create_complement_graph())

  - Added functions to clone existing nodes and edges
    (add_n_node_clones() and add_edge_clone())

  - Added several count_* functions (count_asymmetric_node_pairs(),
    count_automorphisms(), etc.)

  - Added new functions to obtain graph properties (get_adhesion(),
    get_girth(), get_reciprocity(), etc.)

  - Added several is_* functions for graph and edge properties (e.g.,
    is_edge_loop(), is_graph_dag(), etc.)

  - The mutate_node_attrs() and mutate_edge_attrs() functions now have
    simpler and more powerful interfaces for mutating node and edge
    attributes

  - Graphs can be easily saved to disk (and read from disk) using the
    save_graph() and open_graph() functions

                 Changes in version 0.9.0 (2017-01-03)                  

  - Modified basic structure of node and edge data frames such that ID
    values are automatically set as integer values

  - Just as nodes do, edges now have edge ID values (they can be
    obtained using get_edge_ids() and they can be used directly in the
    select_edges_by_edge_id() function)

  - When created, a graph object automatically generates a graph ID and
    graph name (which can be modified using set_graph_name())

  - So long as node label values are unique, they may now be used to
    compose edges using the add_edge() function with use_labels = TRUE

  - Quickly and flexibly add color to nodes and edges using the
    colorize_node_attrs() and colorize_edge_attrs() functions

  - Added functions to selectively modify existing node and edge
    attributes: copy_[node/edge]_attrs(), drop_[node/edge]_attrs(),
    mutate_[node/edge]_attrs(), recode_[node/edge]_attrs(),
    rename_[node/edge]_attrs(), and rescale_[node/edge]_attrs().

  - New node and edge attributes can now be easily added to a graph via
    a data frame using the join_node_attrs() and join_edge_attrs()
    functions

  - Several graph generators are available for quickly adding graph
    primitives to a graph object (add_balanced_tree(), add_cycle(),
    add_full_graph(), add_path(), add_prism(), and add_star())

  - All traversal functions can now migrate numeric node or edge
    attribute values to the traversed edges (e.g., trav_out_edge(),
    trav_in_node()) by providing an attribute name to copy_attrs_from();
    for those traversal functions where nodes or edges may receive
    multiple values, one can specify an aggregation type in their agg
    argument (e.g,. trav_in_node(), trav_both_edge())

  - Multiple conditions can be specified for all traversal types and for
    the select_nodes() and select_edges() functions, plus, they are much
    easier to write

  - Added the mk_cond() helper function for creating conditions for any
    of the traversal functions (trav_...()), and, the select_nodes() and
    select_edges() functions; this helper allows for easier composition
    of selection/traversal conditions using variables and/or function
    calls

  - With a selection of edges one can now use select_rev_edges_ws() to
    transform that selection to that of the selected edges' reverse
    edges (where available); the option is there to add the reverse
    edges to the edge selection or to simply replace the current
    selection

  - Caching attributes for later use has been made simpler with a
    collection of cache_...() functions (or, set the cache explicitly
    using set_cache()); get the graph's cache using the get_cache()
    function

  - Added functions to allow for layout control of nodes
    (set_node_position(), layout_nodes_w_string(),
    nudge_node_positions())

  - Added functions to convert DiagrammeR graphs to igraph graphs and
    vice versa (to_igraph(), from_igraph())

  - Now you can create a graph from an adjacency matrix
    (from_adj_matrix())

  - Added functions to get community membership with a variety of
    algorithms: get_cmty_edge_btwns(), get_cmty_fast_greedy(),
    get_cmty_l_eigenvec(), get_cmty_louvain(), and get_cmty_walktrap().

  - Added functions to determine similarity coefficient scores for graph
    nodes: get_dice_similarity() and get_dice_similarity().

  - Constraint scores for nodes can now be determined using the
    get_constraint() function

  - Functions for getting information on nodes neighbors have been
    added: get_nbrs(), get_non_nbrs(), get_similar_nbrs().

  - Groups of nodes that are weakly or strongly connected components can
    be determined using the get_w_connected_cmpts() and
    get_s_connected_cmpts() functions

  - Get articulation points (i.e., nodes that, when removed, disconnect
    the graph) with the get_articulation_points() function

  - Obtain centrality measures for graph nodes using the get_closeness()
    and get_betweenness() functions

  - Get the minimum-spanning tree subgraph from a graph with weighted
    edges using the get_min_spanning_tree() function

  - The edge direction may be reversed for an entire graph
    (rev_edge_dir()) or for part of a graph using an edge selection
    (rev_edge_dir_ws())

  - Depth-first search and breadth-first search algorithms are available
    in the do_dfs() and do_bfs() functions

  - Degree data for plots can now be easily obtained using the
    get_degree_distribution() and get_degree_histogram() functions

  - Global graph attributes are now more easily modifiable using a set
    of functions for this purpose: add_global_graph_attrs(),
    delete_global_graph_attrs(), get_global_graph_attr_info().

  - Added option to display different text labels on nodes via the
    display node attribute; this is easily set with the
    set_node_attr_to_display() function

  - Rewrote many graph functions (e.g. traversals) so that they are
    faster for very large graphs

  - A log of all graph functions that directly modify the graph is now
    part of the graph object (graph$graph_log)

  - Added functionality to automatically generate graph backups at every
    graph modification; this is in the form of RDS files deposited in a
    subdirectory (name is based on the graph ID) of the working
    directory; the option (write_backups, set to FALSE by default) is
    available in all functions that initialize a graph object
    (create_graph(), create_random_graph(), from_igraph(),
    from_adj_matrix())

                  Changes in version 0.8 (2015-10-08)                   

  - Revised many graph functions so they work better together

  - Added many testthat tests to maintain the quality of the graph
    functions

  - Added functions create_random_graph(), import_graph(),
    combine_graphs(), country_graph() and select_graph_from_series()

  - Added support for visNetwork graphs as a rendering option with
    render_graph()

                  Changes in version 0.7 (2015-06-11)                   

  - Renamed functions graphviz_graph() and graphviz_render() to
    create_graph() and render_graph(), respectively

  - Removed function graphviz_export() (exporting now handled with
    render_graph())

  - Added several new functions to inspect, analyze, and modify graphs:
    display_graph_object(), node_info(), edge_info(), node_present(),
    edge_present(), get_nodes(), get_edges(), get_predecessors(),
    get_successors(), node_count(), edge_count(), is_graph_empty(),
    is_graph_directed(), add_node(), add_edges(), delete_node(),
    delete_edge(), node_type(), edge_relationship(), create_series(),
    add_to_series(), remove_from_series(), graph_count(),
    subset_series(), trigger_script(), render_graph_from_series(), and
    series_info()

                  Changes in version 0.6 (2015-04-30)                   

  - Added several functions to work with graphs: create_node_df(),
    create_edges(), combine_nodes(), combine_edges(), scale_nodes(),
    scale_edges(), get_nodes(), node_info(), graphviz_graph(),
    graphviz_render(), and graphviz_export()

  - Removed the graphviz_nodes_edges_df() and graphviz_single_df()
    functions

                  Changes in version 0.5 (2015-03-19)                   

  - Added support for subgraphs and Gantt charts in mermaid diagrams

  - Added function graphviz_nodes_edges_df() for generating Graphviz DOT
    code that defines nodes and edges (and their attributes) from data
    in two data frames: one for nodes, the other for the edge operations

  - Added function graphviz_single_df() for generating Graphviz DOT code
    from a single data frame

  - Incorporated the new substitution operators @_{...} or @^{...} in
    grViz statements for subscripting and superscripting, respectively

                  Changes in version 0.4 (2015-01-30)                   

  - Added support for substitution in Graphviz graph specifications

  - Added support for Graphviz diagrams in the Shiny app

                         Changes in version 0.3                         

  - Added support for the Graphviz neato, twopi, and circo engines

                         Changes in version 0.2                         

  - Added the viz.js library to enable Graphviz support

                  Changes in version 0.1 (2015-01-09)                   

  - Initial release

  - Incorporated into the htmlwidgets framework

  - Added basic shiny app