Aggregate some data from the DataSHIELD R session using a valid R expression. The aggregation expression must satisfy the data repository's DataSHIELD configuration.
dsAggregate(conn, expr, async = TRUE)An object that inherits from DSConnection-class.
Expression to evaluate.
Whether the result of the call should be retrieved asynchronously. When TRUE (default) the calls are parallelized over the connections, when the connection supports that feature, with an extra overhead of requests.
Other DSConnection generics:
DSConnection-class,
dsAssignExpr(),
dsAssignResource(),
dsAssignTable(),
dsDisconnect(),
dsGetInfo(),
dsHasResource(),
dsHasTable(),
dsIsAsync(),
dsKeepAlive(),
dsListMethods(),
dsListPackages(),
dsListProfiles(),
dsListResources(),
dsListSymbols(),
dsListTables(),
dsListWorkspaces(),
dsRestoreWorkspace(),
dsRmSymbol(),
dsRmWorkspace(),
dsSaveWorkspace()
if (FALSE) {
con <- dsConnect(DSOpal::Opal(), "server1",
username = "dsuser", password = "password", url = "https://opal-demo.obiba.org")
dsAssignTable(con, "D", "test.CNSIM")
dsAggregate(con, as.symbol("meanDS(D$WEIGHT)"))
dsDisconnect(con)
}