ggtime's Introduction

ggtime

The ggtime package provides tools for graphically analysing time series, with exploration of trend and seasonality. It utilises the tsibble data format for time series and produces plots with ggplot2.

Installation

You can install the development version of ggtime from GitHub with:

# install.packages("remotes")
remotes::install_github("tidyverts/ggtime")

Example

library(ggtime)
library(tsibble)
#> 
#> Attaching package: 'tsibble'
#> The following objects are masked from 'package:base':
#> 
#>     intersect, setdiff, union
tsibbledata::aus_production %>% 
  autoplot(Bricks)
#> Warning: Removed 20 rows containing missing values (`geom_line()`).

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ggtime's Issues

Rounding of date-times and wrap points

coord calendar

Use a wrapped cartesian coordinate system to plot temporal data in calendar like layouts instead of calculated variables (e.g. https://github.com/cynthiahqy/ggtilecal)

Should support:

week in year layout with month line breaks;
faceted months, years
position after each wrap point -- 0 for over plot, 1, -1 for direction
ragged layout
split rendering of geometries across rows (maybe not possible in ggplot2)
most other geoms out of the box (e.g. moon phases which calendR has options for)

Needs:

Wrap point helpers similar to lubridate::floor_date() Gregorian calendar
hack grouping to fix rendering limitations (for portals!)

Stretch goal -- wrapping non-gregorian calendar layouts:

needs different datetime rounding system:
- helpers for specifying "floor" functions e.g. floor_date_lunar()
- return the nearest wrapping points
- wrapping points via sequence generator OR lookup table

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