nhanes_vcov: Extract variance/covariance matrix from parameters of svymean
In RNHANES: Facilitates Analysis of CDC NHANES Data

Extract variance/covariance matrix from parameters of svymean

1	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)

RNHANES documentation built on May 2, 2019, 5:08 a.m.

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