WOLFRAM

Wolfram Language & System Documentation Center

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 and Options
Details and Options Details and Options
Examples  
Basic Examples  
See Also
Tech Notes
Cite this Page
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 and Options

  • 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)

Wolfram Language code: Needs["RLink`"] InstallR[]

Get a short form of a vector:

Wolfram Language code: FromRForm[RVector["integer", {1, 2, 3, 4, 5}, RAttributes[]]]

Or of a matrix:

Wolfram Language code: FromRForm[ RVector["integer", {1, 4, 2, 5, 3, 6}, RAttributes["dim" :> RVector["integer", {2, 3}, RAttributes[]]]]]
Wolfram Research (2012), FromRForm, Wolfram Language function, https://reference.wolfram.com/language/RLink/ref/FromRForm.html.

Text

Wolfram Research (2012), FromRForm, Wolfram Language function, https://reference.wolfram.com/language/RLink/ref/FromRForm.html.

CMS

Wolfram Language. 2012. "FromRForm." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/RLink/ref/FromRForm.html.

APA

Wolfram Language. (2012). FromRForm. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/RLink/ref/FromRForm.html

BibTeX

@misc{reference.wolfram_2026_fromrform, author="Wolfram Research", title="{FromRForm}", year="2012", howpublished="\url{https://reference.wolfram.com/language/RLink/ref/FromRForm.html}", note=[Accessed: 13-June-2026]}

BibLaTeX

@online{reference.wolfram_2026_fromrform, organization={Wolfram Research}, title={FromRForm}, year={2012}, url={https://reference.wolfram.com/language/RLink/ref/FromRForm.html}, note=[Accessed: 13-June-2026]}