Trend lines
Let's return to the bubble plot of Height versus Weight, colored by Gender, for 20 year olds. It's now time to add trends lines and compare the trend lines when we do and do NOT account for the survey weights.
Questo esercizio fa parte del corso
Analyzing Survey Data in R
esercizio interattivo pratico
Prova questo esercizio completando questo codice di esempio.
# Add non-survey-weighted trend lines to bubble plot
ggplot(data = NHANES20, mapping = aes(x = Height, y = Weight, size = WTMEC4YR, color = Gender)) +
geom_point(alpha = 0.1) +
guides(size = "none") +
geom____(method = ___, se = FALSE, linetype = 2)