MetricGraph 1.3.0

• Handlers were added in add_observations() for situations where observations are projected at the same location, specifically for the duplicated_strategy argument.
• A simulate method was added for graph_lme objects.
• The possibility of fixing parameters during estimation was added.
• The Spoints argument in add_observations() has been deprecated. Now, SpatialPointsDataFrame can be added directly in the data argument.
• sf objects containing data can also be directly added using the add_observations() method in the data argument.
• The option of using a graph_lme object to provide starting values when fitting a model using graph_lme() was added.
• The option of fitting a directional Whittle-Matérn model with alpha=1 when using graph_lme() was added.
• The kirchhoff_weights argument was added to obtain weights for Kirchhoff vertex conditions from edge_weights.
• Handling of edge weights was improved. For example, if pruning changes any edge weight, a warning will be given.
• The edgeweight_to_data() method was added to turn edge weights into data in the internal metric graph format.
• edge_weight and edge_width_weight were added to the plot() method so that plots on metric graphs can be produced with the weights providing colors to the edges, and also with (possibly different) weights providing the thickness of the edges.
• edge_weights were added to graph_components so that the connected components will have the correct corresponding edge weights.
• edge_weight and edge_width_weight were added to the plot_function() method, where they work in a similar manner to their counterparts for the plot() method. The difference is that the weights are plotted as piecewise constant functions.
• The prune_vertices now has an option to not prune vertices whose edges have incompatible edge weights.
• The plot method has an interactive argument that returns the 2D plot as a plotly object, which is interactive when using ggplotly.
• The dependency on the viridis package has been removed.

MetricGraph 1.2.0

• Changed argument data to newdata in predict methods. The argument data was deprecated.
• Bugfixes on sample_spde and when adding observations based on Euclidean positions.
• Added options vertex_unit and length_unit on graph creations. Units are given in edge lengths with the get_edge_lengths() method.
• Added a method to check if the graph is a tree.
• The graph construction was thoroughly refactored. The resulting construction is faster and cleaner.
• The graph constructions now accepts list of coordinates (where the coordinates are given as either matrices or data frames), SpatialLines, SpatialLinesDataFrames or MULTILINESTRING.
• Adding two options (sf package or sp package) for handling longlat by using the which_longlat option.
• Adding crs (if using sf) and proj4string (if using sp) for handling general coordinate reference systems.
• Moving data to the private environment.
• Several data manipulation helper tools and methods were introduced, together with a vignette with a brief tutorial on these tools.
• The method mesh_A() has been deprecated, use fem_basis() instead.
• Several quality of life improvements.
• Improved the plot() method with the option plotly=TRUE.
• Improved the plot_function() method to accept data and newdata.
• Included a process_data() method for metric graphs
• Renamed the data internal structure from "__group“,”__edge_number“,”__distance_on_edge“,”__coord_x“,”__coord_y" to “.group”, “.edge_number”, “.distance_on_edge”, “.coord_x” and “.coord_y”.
• Added an “advanced grouping” option, in which the group variable can be a combination of several columns.
• Improved graph_lme() behavior to avoid having NaN as std.errors.
• Added check for distance consistency and, more generally, check to see if the graph has euclidean edges.
• Added method get_groups() to get the unique groups, and also to retrieve the columns that were used to create the group variable.
• Added the get_data() method to get the data in a user-friendly manner.
• Added glance() and augment() methods for graph_lme() objects.
• Added get_vertices_incomp_dir() method to return vertices with incompatible directions.
• Added print(), summary(), compute_characteristics(), check_euclidean(), check_distance_consistency() methods.
• Added support for edge weights.
• Created vertices element in the metric graph object, containing information such as degrees, indegrees, outdegrees.
• Created print methods for edges, vertices, and for their entries.
• Added the improve_plot option on plot_function.
• Added support for discontinuous meshes (at the vertices).
• Added support for discontinuous functions (at the vertices) for plot_function().

MetricGraph 1.1.2

• Adjusts to ensure compatibility with future releases of the Matrix package.

MetricGraph 1.1.1

• Adjusts on documentation for CRAN.

MetricGraph 1.1.0

• Improved the documentation.
• Reorganized some functions.

MetricGraph 1.0.0

• First version of the package.