nhanesA (version 0.6.5.3)

nhanesTranslate: Display code translation information.

Description

Returns code translations for categorical variables, which appear in most NHANES tables.

Usage

nhanesTranslate(
  nh_table,
  colnames = NULL,
  data = NULL,
  nchar = 32,
  mincategories = 2,
  details = FALSE,
  dxa = FALSE
)

Arguments

nh_table

The name of the NHANES table to retrieve.

colnames

The names of the columns to translate.

data

If a data frame is passed, then code translation will be applied directly to the data frame. In that case the return argument is the code-translated data frame.

nchar

Applies only when data is defined. Code translations can be very long. Truncate the length by setting nchar (default = 32).

mincategories

The minimum number of categories needed for code translations to be applied to the data (default=2).

details

If TRUE then all available table translation information is displayed (default=FALSE).

dxa

If TRUE then the 2005-2006 DXA translation table will be used (default=FALSE).

Value

The code translation table (or translated data frame when data is defined).

Details

Code translation tables are retrieved via webscraping using rvest. Many of the NHANES data tables have encoded values. E.g. 1 = 'Male', 2 = 'Female'. Thus it is often helpful to view the code translations and perhaps insert the translated values in a data frame. Note that Hmisc supports "labelled" fields. When a translation is applied directly to a column in a data frame, the column class is first converted to 'factor' and then the coded values are replaced with the code translations.

Examples

# NOT RUN {
nhanesTranslate('DEMO_B', c('DMDBORN','DMDCITZN'))
nhanesTranslate('BPX_F', 'BPACSZ', details=TRUE)
# }
# NOT RUN {
nhanesTranslate('BPX_F', 'BPACSZ', data=nhanes('BPX_F'))
# }