RDataTypeRegister
RDataTypeRegister[type,fwpatt,fwrule,bckpatt,bckrule] registers a new Mathematica representation for a data type with name type.
更多信息和选项
- The type argument should normally be a string.
- Expressions matching the fwpatt pattern will be considered by RLink to be of type type.
- The rule fwrule instructs RLink how to convert the new Mathematica representation to representation based on RObject.
- The bckpatt pattern identifies types of expressions based on RObject that RLink considers to represent objects of type type.
- The rule bckrule instructs RLink how to convert such expressions to a more convenient, higher-level Mathematica representation defined with RDataTypeRegister.
- If the type with the name type has already been registered, RDataTypeRegister returns $Failed.
范例
基本范例 (1)
First load and install the R runtime:
This will register a very simple data type (wrapper) that wraps around some core R data type, such as a vector:
You can test that the definition is now effective by using ToRForm:
You can now send your data to R, using the custom data container just defined:
The result is automatically converted according to the inverse conversion rule used above in RDataTypeRegister, when returned back from R:
You can see that this will also work on derivative R objects obtained through manipulations with the original object that do not change its type (class in R):
You can now unregister the data type:
Now the following will get back the usual representation based on RObject:
文本
Wolfram Research (2012)，RDataTypeRegister，Wolfram 语言函数，https://reference.wolfram.com/language/RLink/ref/RDataTypeRegister.html.
CMS
Wolfram 语言. 2012. "RDataTypeRegister." Wolfram 语言与系统参考资料中心. Wolfram Research. https://reference.wolfram.com/language/RLink/ref/RDataTypeRegister.html.
APA
Wolfram 语言. (2012). RDataTypeRegister. Wolfram 语言与系统参考资料中心. 追溯自 https://reference.wolfram.com/language/RLink/ref/RDataTypeRegister.html 年