search_variables {rdhs}

Search Survey Variables

Description

Searches across datasets specified for requested survey variables. This function (or search_variable_labels) should be used to provide the 'questions' argument for extract_dhs.

Usage

search_variables(dataset_filenames, variables, essential_variables = NULL, ...)

Arguments

dataset_filenames

The desired filenames to be downloaded. These can be found as one of the returned fields from dhs_datasets.

variables

Character vector of survey variables to be looked up

essential_variables

Character vector of variables that need to present. If any of the codes are not present in that survey, the survey will not be returned by this function. Default = 'NULL'.

...

Any other arguments to be passed to download_datasets

Details

Use this function after get_datasets to look up all the survey variables that have the required variable.

Value

A data.frame of the surveys where matches were found and then all the resultant codes and descriptions.

Examples

## Not run: 
# get the model datasets included with the package
model_datasets <- model_datasets

# download two of them
g <- get_datasets(dataset_filenames = model_datasets$FileName[1:2])

# and now seearch within these for survey variables
search_variables(
dataset_filenames = names(g), variables = c("v002","v102","ml13"),
)

# if we specify an essential variable then that dataset has to have that
# variable or else no variables will be returned for that datasets
search_variables(
dataset_filenames = names(g),
variables = c("v002","v102","ml13"),
essential_variables = "ml13"
)

## End(Not run)