Air Quality"
In foqat: Field Observation Quick Analysis Toolkit

knitr::opts_chunk$set(
  collapse = TRUE,
  comment = "#>"
)

To begin, we’ll load foqat and show one dataset in foqat:
aqi is a dataset about time series of air quality with 1-second resolution.

library(foqat)
head(aqi)

Calculate daily maximum-8-hour ozone

You can use dm8n() to calculate daily maximum-8-hour ozone.
colid is the column index of date. colio is the column index of ozone. outputMode have two options: value 1 will output 1 list which incudes 1 table (maximum-8-hour ozone); value 2 will output 1 list which contains 4 tables (8-hour ozone, statistics of the number of effective hourly concentrations in each 8-hour average concentration, statistics of the number of effective 8-hour average concentrations in each day, maximum-8-hour ozone). This function will calculate the average values of other species at the same time and plot them.

dm8n_df = dm8n(aqi, colio=6, outputmode = 1)

If you do not want the plot or you want to save time, you can try dm8n_np()

dm8n_df = dm8n_np(aqi, colio=6, outputmode = 1)
dm8n_df

Calculate daily maximum-8-hour ozone in batch

dm8n_batch() allows you to calculate daily maximum-8-hour ozone of multiple sites (or cities, or sensors), which means that it will calculate daily maximum-8-hour ozone for all columns except first column (date).