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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.

Cet exercice fait partie du cours

Analyzing Survey Data in R

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Exercice interactif pratique

Essayez cet exercice en complétant cet exemple de code.

# 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)
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