| dsAggregate {DSI} | R Documentation |
Aggregate data
Description
Aggregate some data from the DataSHIELD R session using a valid R expression. The aggregation expression must satisfy the data repository's DataSHIELD configuration.
Usage
dsAggregate(conn, expr, async = TRUE)
Arguments
conn |
An object that inherits from |
expr |
Expression to evaluate. |
async |
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. |
See Also
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()
Examples
## Not run:
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)
## End(Not run)