RNHANES: nhanes_vcov – R documentation

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nhanes_vcov

Extract variance/covariance matrix from parameters of svymean

Extract variance/covariance matrix from parameters of svymean

nhanes_vcov(nhanes_data, columns, weights_column = "", filter = "")

`nhanes_data`	data frame containing NHANES data
`columns`	columns to include in svymean for
`weights_column`	name of the weights column
`filter`	logical expression used to subset the data

a data frame

## Not run: 
dat <- nhanes_load_data("PFC_G", "2011-2012", demographics = TRUE)

nhanes_vcov(dat, c("LBXPFOA", "LBXPFOS"))

## End(Not run)

Facilitates Analysis of CDC NHANES Data

v1.1.0

Apache License 2.0 | file LICENSE

Authors

Herb Susmann [cre, aut], Silent Spring Institute [cph]

Initial release

2016-11-28