Fetch data request from EpiVault

Interprets an ev_variables container, fetches the data from EpiVault and returns it in an ev_data container.

Usage

fetch_ev_data(con, ev_vars, visibility = 0)

Arguments

con

An EpiVault connection object

ev_vars

An ev_variables container

visibility

(default=0) Maximum visibility level requested. See examples.

Value

An ev_data container

Details

Passes ev_vars to fetch_ev_meta_vars and fetch_ev_meta_tabs to get the metadata ready for processing, fetches the tabular data from EpiVault before applying data labels. All fetched data and metadata is returned in an ev_data container.

See also

Other data request functions: ev_simple_fetch(), fetch_ev_meta_tabs(), fetch_ev_meta_vars(), make_ev_variables(), read_ev_variables(), write_ev_data()

Examples

if (FALSE) { # \dontrun{

con <- ev_connect()

# read a variable data request file
vars <- read_ev_variables("path/to/variables/file")

# fetch the data from EpiVault - default visibility for standard data requests
ev <- fetch_ev_data(con, vars)

# fetch the data from EpiVault - highest visibility to access sensitive variables
ev <- fetch_ev_data(con, vars, visibility = 9)

} # }