Mean in Pollution Rose differs from normal mean

[Saolaina]

Hi, I need to know how the average for the pollution rose is calculated, as when I calculate the average of the pollutant I get a different result than with the package.

Cheers, Saolaina

e.g.

[schonhose]

Is it possible that the mean in the plot is based on concentrations with meteorological data only? In other words, samples without meteorological data might be omitted.

[jack-davison]

@schonhose is spot on; pollutionRose() drops missing met data first, as that is the data visualised in the rose itself.

mean(openair::mydata$nox, na.rm = TRUE)
#> [1] 178.7986

mean(openair::mydata$nox[!is.na(openair::mydata$ws)], na.rm = TRUE)
#> [1] 178.6236

openair::pollutionRose(openair::mydata)

^{Created on 2023-02-07 with reprex v2.0.2}