Add NowCast values to a plot

This function calculates the NowCast version of the data, and adds it to a plot. The default is to add a NowCast line.

stat_nowcast(
  mapping = NULL,
  data = NULL,
  version = "pm",
  includeShortTerm = FALSE,
  geom = "path",
  aqiColors = FALSE,
  mv4Colors = FALSE,
  position = "identity",
  na.rm = FALSE,
  show.legend = NA,
  inherit.aes = TRUE,
  ...
)

Arguments

mapping

Set of aesthetic mappings created by aes(). If specified and inherit.aes = TRUE (the default), it is combined with the default mapping at the top level of the plot. You must supply mapping if there is no plot mapping.

data

The data to be displayed in this layer. There are three options: if NULL, the default, the data is inherited from the plot data. A data.frame or other object, will override the plot data. A function will be called with a single argument, the plot data. The return value must be a data.frame, and will be used as the layer data.

version

character identity specifying the type of nowcast algorithm to be used. For details see monitor_nowcast.

includeShortTerm

calculate preliminary NowCast values starting with the 2nd hour.

geom

The geometic object to display the data

aqiColors

if TRUE, AQI colors will be displayed.

mv4Colors

if TRUE, AQI colors from the monitoring V4 site will be used. Ignored if aqiColors is FALSE.

position

Position adjustment, either as a string, or the result of a call to a position adjustment function.

na.rm

remove NA values from data

show.legend

logical indicating whether this layer should be included in legends.

inherit.aes

if FALSE, overrides the default aesthetics, rather than combining with them. This is most useful for helper functions that define both data and the aesthetics and shouldn't inherit behaviour from the default plot specificatino, eg borders().

...

additional arguments passed on to layer(), such as aesthetics.

Examples

library(AirMonitorPlots)

ggplot_pm25Timeseries(
  AirMonitor::Carmel_Valley,
  startdate = 20160801,
  enddate = 20160810
) +
  geom_pm25Points() +
  stat_nowcast()
#> Warning: Removed 335 rows containing missing values (`geom_pm25points()`).
#> Warning: Removed 328 rows containing missing values (`geom_path()`).