RLink`
RLink`

FromRForm

FromRForm[expr]

converts a full form of an expression expr, representing some valid R object, to the short form. Returns $Failed on illegal expressions, which do not form a valid RLink representation of an R object.

Details

  • Performs the reverse operation as compared to ToRForm.
  • Is invoked automatically by REvaluate, as a final step to transform the internal full form of an expression obtained from R to a short form, which is easier to use.
  • While sometimes useful for consistency checks and debugging, it is not expected that this function will be called often.
  • The "cycle" FromRForm[ToRForm[expr]] should always give back the same expression expr (for legitimate expr, representing valid R objects), except when expr is a scalar of one of the primitive types (numeric, string, or logical), in which case it will be "dressed" in an extra List.

Examples

Basic Examples  (1)

In[1]:=
Click for copyable input

Get a short form of a vector:

In[2]:=
Click for copyable input
Out[2]=

Or of a matrix:

In[3]:=
Click for copyable input
Out[3]=

See Also

ToRForm  REvaluate  RSet

Tutorials