Assign a Opal table, or a R expression or a R object to a R symbol in the current R session.
opal.assign(
opal,
symbol,
value,
variables = NULL,
missings = FALSE,
identifiers = NULL,
id.name = NULL,
updated.name = NULL,
async = FALSE
)Opal object or list of opal objects.
Name of the R symbol.
The value to assign evaluated in the following order: a R expression, a function, a fully qualified name of a variable or a table in Opal or any other R object (data.frame, vector).
List of variable names or Javascript expression that selects the variables of a table (ignored if value does not refere to a table). See javascript documentation: http://wiki.obiba.org/display/OPALDOC/Variable+Methods
If TRUE, missing values will be pushed from Opal to R, default is FALSE. Ignored if value is an R expression.
Name of the identifiers mapping to use when assigning entities to R (from Opal 2.0).
Add a vector with the given name representing the entity identifiers (from Opal 2.6). Default is NULL.
Add a vector with the given name representing the creation and last update timestamps (from Opal 2.6). Default is NULL.
R script is executed asynchronously within the session (default is FALSE). If TRUE, the value returned is the ID of the command to look for (from Opal 2.1).
Other assignment functions:
opal.assign.data(),
opal.assign.resource(),
opal.assign.script(),
opal.assign.table.tibble(),
opal.assign.table()
if (FALSE) {
o <- opal.login('administrator','password', url='https://opal-demo.obiba.org')
# assign a list of variables from table CNSIM1
opal.assign(o, symbol="D", value="datashield.CNSIM1", variables=list("GENDER","LAB_TSC"))
# assign all the variables matching 'LAB' from table HOP of opal object o
opal.assign(o, symbol="D", value="datashield.CNSIM1", variables="name().matches('LAB_')")
# assign a function and call it
opal.assign.script(o, 'hello', quote(function(x) { print(paste0('Hello ', x , '!'))}))
opal.execute(o, "hello('Mr Bean')")
# push an arbitrary data frame to the R server
#opal.assign(o, "D", mtcars)
# push an arbitrary vector to the R server
#opal.assign(o, "C", mtcars$cyl)
opal.logout(o)
}