stat_meanByHour: Add hourly averages to a plot
In MazamaScience/AirSensorDataViewer: AirSensorDataViewer

This function calculates the mean y-value for each x-value. Should be used only when x is discrete. The resulting mean can be mapped to any aesthetic, specified with the output parameter.

stat_meanByHour(
  mapping = NULL,
  data = NULL,
  input = NULL,
  output = "y",
  geom = "bar",
  position = "identity",
  na.rm = TRUE,
  show.legend = NA,
  inherit.aes = TRUE,
  ...
)

`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.
`input`	The value to find the mean of. If `NULL`, the default `y` value will be used.
`output`	"AQIColors", "mv4Colors", "scaqmd", "y"
`geom`	The geometic object to display the data
`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.