sftrack 0.5.3 (2021-07-01): CRAN update

• Minor bug in geom_sftrack.sftrack that caused an error.
• Updated email addresses for 2 authors, including maintainer.

sftrack 0.5.2 (2020-10-20)

• Clean up for CRAN (DESCRIPTION, version, LICENSE, vignettes…).
• Added full pkgdown website.

sftrack 0.5.1 (2020-09-16)

• Patched print error when using numeric time.
• Vignette updates.

sftrack 0.5 (2020-09-13): Major update.

• Changed from ‘burst’ name to ‘group’ name. This includes changing ind_burst -> s_group (single group) and multi_burst -> c_grouping (column grouping). Verbage has also been changed in all documentation.
• Relative angle added to summary_sftrack, as well as fixing issue where absolute angle was calculating 180 from actual angle.
• ‘Active_group’ were placed back at the column level. This means that any row level group does not have an active burst, but a column collection of bursts can define which of those groupings are ‘activated’.
• Sort index returns and is an attribute of a column grouping. It is a factor that is recalculated everytime something in the data frame is changed like a subset or grouping is changed. This is to try to bring the sftrack grouping more inline with how dplyr::group_by works internally. You can access this with burst_labels (returns the factor) and burst_names (get just the levels()).
• Plotting is more streamlined in both base plot and ggplot. A step_mode has been added for sftraj so you can choose to display the individual line segments. Although the default is to calculate the merged trajectories, which is must faster.