sfhotspot 1.0.0

New function hotspot_clip() added to extract points from an SF object inside the boundary of a polygon (#57).
By default lat/lon data is now transformed to use a projected co-ordinate reference system before kernel density estimation and then transformed back afterwards (previously trying to run KDE on lat/lon data resulted in an error). Datasets can also be automatically transformed to/from lat/lon using st_transform_auto() (#48).
Functions now return useful error if provided with an empty dataset (#58).
Adjusted bandwidth now reported accurately (#56).
Removed dependency on the rmarkdown package in favour of using the quarto package to generate vignettes.

sfhotspot 0.9.2

hotspot_grid() handles non-multipolygon input geometries (#46).
hotspot_dual_kde(), hotspot_gistar() and hotspot_kde() now warn if KDE bandwidth is smaller than cell size (#29).
count_points_in_polygons() (which is used internally to count points in all the hotspot_*() family of functions) now respects quiet = TRUE (#52).
Conditions now formatted with the cli package and following the Tidyverse Style Guide for errors (#47).

count_points_in_polygons() now passes through columns in the original dataset, which makes hotspot_count() more useful (#41).
hotspot_grid() if provided with polygons now bases the grid on the boundary of the polygons rather than the convex hull of the boundary (#42).
New dataset memphis_precincts showing Memphis Police Department precincts, which is required to test the new functionality of hotspot_grid().
hotspot_gistar() now extracts nearest neighbour distance from provided grid and does not wrongly rely on (and report) an automatically generated cell size (#38).
Warnings about grids containing very large numbers of cells is now printed before the cells are created, helping explain why code may be running slower than expected (#33).
Improved error message produced when point data and provided grid do not overlap (#39).
Suppressed progress bar previously included in README (#36).

All functions can now handle SF objects in which the geometry column has a name other than geometry (#30).
hotspot_kde() progress bar is now suppressed by quiet = TRUE (#25).
When KDE bandwidth is selected automatically based on a rule of thumb, the reported bandwidth now takes into account the value of bandwidth_adjust (#32).

Added warning if automatically created grids contain more than 100,000 cells, since this can cause other functions in the package to run very slowly (#24).
Fixed bug in which cell size could be incorrectly rounded to zero (#26).
Removed covr dependency.

New function hotspot_change() and corresponding methods for autoplot() and autolayer() for measuring change in the frequency of events between two time periods (#14).

Fixed bug in which the message produced when setting bandwidth automatically referred to the unadjusted rather than adjusted bandwidth (#22).

New function hotspot_dual_kde() for estimating different relations between the density of two point layers (#1).
New dataset memphis_population showing the 2020 population of the centroids of census blocks in Memphis, TN.

Users can now specify weights for counts of points and kernel density estimation via the weights argument to hotspot_count(), hotspot_kde() and hotspot_gistar().

Users can now provide their own grid using the grid argument to the hotspot_*() family of functions.
New function hotspot_grid() added so users can create a rectangular or hexagonal grid separately from counting points, calculating KDE values, etc. This may be useful to use the same grid for different datasets covering a similar area.

Fixed bug where ... arguments were not passed on to SpatialKDE::kde() as specified in the documentation.

Added autoplot() methods for plotting the results produced by hotspot_count(), hotspot_kde() and hotspot_classify().
Added bandwidth_adjust argument to hotspot_kde() and hotspot_gistar() so that bandwidth can be set relative to the default.

Added checking for empty geometries and co-ordinates on Null Island (or equivalent zero co-ordinates in other co-ordinate systems). Empty geometries produce an error and zero co-ordinates produce a warning.

Fixed a bug where a grid of cells could not be created for an SF object with no CRS defined (and improved the error message when trying to calculate KDE values in this circumstance).
Fixed a bug where the grid returned by the hotspot_*() family of functions was not clipped to the convex hull of the data, as specified in the documentation.

Fixed a problem with some of the examples in the documentation taking too long to run, which caused them to fail CRAN checks.

Initial release of the package with the functions hotspot_count(), hotspot_kde() and hotspot_gistar().