Summarizing a categorical variable
The NHANES variable, Depressed, gives the self-reported frequency in which a participant felt depressed. It is only reported for participants aged 18 years or older. Let's explore the distribution of depression in the US.
Deze oefening maakt deel uit van de cursus
Analyzing Survey Data in R
Praktische interactieve oefening
Probeer deze oefening eens door deze voorbeeldcode in te vullen.
# Specify the survey design
NHANESraw <- mutate(NHANESraw, WTMEC4YR = .5 * WTMEC2YR)
NHANES_design <- svydesign(data = NHANESraw, strata = ~SDMVSTRA, id = ~SDMVPSU, nest = TRUE, weights = ~WTMEC4YR)
# Determine the levels of Depressed
levels(___)