TaylorDiagram           Taylor Diagram for model evaluation with
                        conditioning
TheilSen                Tests for trends using Theil-Sen estimates
aqStats                 Calculate summary statistics for air pollution
                        data by year
binData                 Bin data, calculate mean and bootstrap
                        confidence interval in the mean
calcFno2                Estimate NO2/NOX emission ratios from
                        monitoring data
calcPercentile          Calculate percentile values from a time series
calendarPlot            Plot time series values in a conventional
                        calendar format
conditionalEval         Conditional quantile estimates with additional
                        variables for model evaluation
conditionalQuantile     Conditional quantile estimates for model
                        evaluation
corPlot                 Correlation matrices with conditioning
cutData                 Function to split data in different ways for
                        conditioning
drawOpenKey             Scale key handling for openair
importADMS              CERC Atmospheric Dispersion Modelling System
                        (ADMS) data import function(s) for openair
importAURN              Import data from individual UK Air Pollution
                        Networks
importEurope            Import air quality data from European database
                        until February 2024
importImperial          Import data from Imperial College London
                        networks
importMeta              Import monitoring site meta data for UK and
                        European networks
importTraj              Import pre-calculated HYSPLIT 96-hour back
                        trajectories
importUKAQ              Import data from the UK Air Pollution Networks
linearRelation          Linear relations between pollutants
modStats                Calculate common model evaluation statistics
mydata                  Example air quality monitoring data for openair
openColours             Pre-defined openair colours and definition of
                        user-defined colours
percentileRose          Function to plot percentiles by wind direction
polarAnnulus            Bivariate polarAnnulus plot
polarCluster            K-means clustering of bivariate polar plots
polarDiff               Polar plots considering changes in
                        concentrations between two time periods
polarFreq               Function to plot wind speed/direction
                        frequencies and other statistics
polarPlot               Function for plotting bivariate polar plots
                        with smoothing.
pollutionRose           Pollution rose variation of the traditional
                        wind rose plot
quickText               Automatic text formatting for openair
rollingMean             Calculate rolling mean pollutant values
runRegression           Rolling regression for pollutant source
                        characterisation.
scatterPlot             Flexible scatter plots
selectByDate            Subset a data frame based on date
selectRunning           Function to extract run lengths greater than a
                        threshold
smoothTrend             Calculate nonparametric smooth trends
splitByDate             Divide up a data frame by time
summaryPlot             Function to rapidly provide an overview of air
                        quality data
timeAverage             Function to calculate time averages for data
                        frames
timePlot                Plot time series
timeProp                Time series plot with categories shown as a
                        stacked bar chart
timeVariation           Diurnal, day of the week and monthly variation
trajCluster             Calculate clusters for back trajectories
trajLevel               Trajectory level plots with conditioning
trajPlot                Trajectory line plots with conditioning
trendLevel              Plot heat map trends
windRose                Traditional wind rose plot
