The mydata dataset is provided as an example dataset as part of the openair
package. The dataset contains hourly measurements of air pollutant
concentrations, wind speed and wind direction collected at the Marylebone
(London) air quality monitoring supersite between 1st January 1998 and 23rd
June 2005.
Source
mydata was compiled from data archived in the London Air Quality
Archive. See https://www.londonair.org.uk for site details.
Details
- date
Observation date/time stamp in year-month-day hour:minute:second format (POSIXct).
- ws
Wind speed, in m/s, as numeric vector.
- wd
Wind direction, in degrees from North, as a numeric vector.
- nox
Oxides of nitrogen concentration, in ppb, as a numeric vector.
- no2
Nitrogen dioxide concentration, in ppb, as a numeric vector.
- o3
Ozone concentration, in ppb, as a numeric vector.
- pm10
Particulate PM10 fraction measurement, in ug/m3 (raw TEOM), as a numeric vector.
- so2
Sulfur dioxide concentration, in ppb, as a numeric vector.
- co
Carbon monoxide concentration, in ppm, as a numeric vector.
- pm25
Particulate PM2.5 fraction measurement, in ug/m3, as a numeric vector.
Note
openair functions generally require data frames with
a field "date" that can be in either POSIXct or Date format
Examples
# basic structure
head(mydata)
#> # A tibble: 6 × 10
#> date ws wd nox no2 o3 pm10 so2 co pm25
#> <dttm> <dbl> <int> <int> <int> <int> <int> <dbl> <dbl> <int>
#> 1 1998-01-01 00:00:00 0.6 280 285 39 1 29 4.72 3.37 NA
#> 2 1998-01-01 01:00:00 2.16 230 NA NA NA 37 NA NA NA
#> 3 1998-01-01 02:00:00 2.76 190 NA NA 3 34 6.83 9.60 NA
#> 4 1998-01-01 03:00:00 2.16 170 493 52 3 35 7.66 10.2 NA
#> 5 1998-01-01 04:00:00 2.4 180 468 78 2 34 8.07 8.91 NA
#> 6 1998-01-01 05:00:00 3 190 264 42 0 16 5.50 3.05 NA