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fsr 2.0.1

Minor change

• Replaced lwgeom::st_perimeter() by sf::st_perimeter() (available in version 1.0.15). The package lwgeom is now under Suggests field (fix #33).

fsr 2.0.0

Major changes

• Defined a new hierarchical structure for defining the spatial plateau data types:
  • Added two new spatial plateau data types: pcollection and pcomposition.
  • Redefined the class named pgeometry.
  • Defined three spatial plateau data types that are subclasses of pgeometry: ppoint, pline, and pregion.
  • Specified validity methods for all classes according to the rules of the Spatial Plateau Algebra.
  • These modifications are based on the pull requests performed by Pedro V. A. B. de Venâncio, who is added as a contributor of the package fsr in the current version (#26 - @pedbrgs and #27 - @pedbrgs).
• Added spa_get_type() (based on the pull request #27 - @pedbrgs).
• Updated and improved functions that create pgeometry objects: create_pgeometry() and create_empty_pgeometry() (#27 - @pedbrgs).
• Improved the creation of components by redesigning create_component(). component_from_sfg() is deprecated (it will be removed in the next version of the package).
• Enhanced fsr_plot() and added the support for pcollection and pcomposition objects.
• Added two new external functions that handle pcollection objects: spa_flatten() and pcollection_to_pcomposition() (based on the pull request #31 - @pedbrgs). They are also used by fuzzy geometric set operations on pcollection objects.
• Enhanced fuzzy geometric set operations, which can now handle different data types as input (based on the pull request #31 - @pedbrgs).
• Deprecated spa_common_points() - use spa_intersection() to get the common points of two plateau line objects.
• Deprecated spa_boundary_pregion() - use spa_boundary to get the boundary of a spatial plateau object.
• Enhanced general operations (e.g., spa_core(), spa_boundary()) to deal with the new spatial plateau data types (based on the pull request #31 - @pedbrgs).
• Added three new general operations: spa_alpha_cut(), spa_strict_alpha_cut(), and spa_range().
• Removed the dependency of packages FuzzyR and utils.

Minor changes

• Better organization of the source code by creating more R scripts and rearranging the functions and classes in them.
• Updated format.pgeometry() to include a parameter that determines the maximum number of characters that are shown.
• Updated spa_pwkt() to deal with the new classes (based on the pull request #26 - @pedbrgs).
• Updated spa_is_empty() to deal with the new classes (based on the pull request #26 - @pedbrgs).
• Updated as_tibble() to deal with the new classes.
• Extended fuzzy numerical operations to deal with the new classes (based on the pull request #30 - @pedbrgs).
• Updated fuzzy topological relationships due to the changes in other operators (based on the pull request #31 - @pedbrgs).
• Minor changes in functions of the construction module to use improved operations when manipulating spatial plateau objects.

Change in the list of authors

• Added Pedro Vinícius Almeida Borges de Venâncio (@pedbrgs) as a contributor to the fsr.
• We are grateful for the contributions of Felippe Galdino (@ocfgaldino) and Juliana Strieder Philippsen (@JulianaStrieder) in the first version of the package (1.0.0, 1.0.1, and 1.0.2). Their participation in the package was concluded; thus, they were removed from the list of authors in this version of the package, which includes several changes, improvements, and new methods.

fsr 1.0.2

Minor changes

• Added the parameter d_tolerance in the spa_creator() function. This parameter is employed by the package sf when computing the Voronoi diagram and Delaunay triangulation in the corresponding construction policies.

Bug fixes

• Fixed the fuzzy numerical operations when dealing with empty objects.
• Fixed spa_core() to return an empty crisp spatial object when the input has not a core.
• Fixed some if statements and calculations in the fuzzy topological relationships.
• Fixed the clipping operation in spa_creator() when using the construction policies based on the Voronoi diagram and Delaunay triangulation.

fsr 1.0.1

Major changes

• Added a new construction policy in the spa_creator() function based on the convex hull (an improved implementation from the issue #29).

Minor changes

• Added the publication that describes the fsr package into CITATION.
• Added an optional parameter in spa_creator() named digits (an improved update based on the pull request #28 - @leticiabohnert).

Bug fixes

• Fixed spa_add_component() for checking a specific condition.
• Fixed the management of CRS when plotting spatial plateau objects (fsr_plot()).
• Fixed the management of geometry collections resulting from some geometric computations of the spatial plateau geometric set operations.

fsr 1.0.0

• This is the first release of fsr that consists of the following modules:
  • Fuzzy Spatial Inference Module (e.g., functions to create a fuzzy spatial inference model and functions to evaluate it).
  • Fuzzy Spatial Data Handling Module (e.g., fuzzy numerical operations, fuzzy geometric set operations, and fuzzy topological predicates).
  • Construction Module (e.g., spa_creator()).
  • Basic Module (e.g., S4 classes and basic functions).

These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.