RLink`
RLink`

RDataTypeRegisteredQ

RDataTypeRegisteredQ[type]

returns True if a data type with a given name has been registered in a current RLink session, and False otherwise.

更多信息和选项

  • type should normally be a string.

范例

基本范例  (1)

Test if the data frame type has been registered:

Now unregister it and test again:

Reload type definitions to restore the data frame type registration:

Wolfram Research (2012)，RDataTypeRegisteredQ，Wolfram 语言函数，https://reference.wolfram.com/language/RLink/ref/RDataTypeRegisteredQ.html.

文本

Wolfram Research (2012)，RDataTypeRegisteredQ，Wolfram 语言函数，https://reference.wolfram.com/language/RLink/ref/RDataTypeRegisteredQ.html.

CMS

Wolfram 语言. 2012. "RDataTypeRegisteredQ." Wolfram 语言与系统参考资料中心. Wolfram Research. https://reference.wolfram.com/language/RLink/ref/RDataTypeRegisteredQ.html.

APA

Wolfram 语言. (2012). RDataTypeRegisteredQ. Wolfram 语言与系统参考资料中心. 追溯自 https://reference.wolfram.com/language/RLink/ref/RDataTypeRegisteredQ.html 年

BibTeX

@misc{reference.wolfram_2024_rdatatyperegisteredq, author="Wolfram Research", title="{RDataTypeRegisteredQ}", year="2012", howpublished="\url{https://reference.wolfram.com/language/RLink/ref/RDataTypeRegisteredQ.html}", note=[Accessed: 18-November-2024 ]}

BibLaTeX

@online{reference.wolfram_2024_rdatatyperegisteredq, organization={Wolfram Research}, title={RDataTypeRegisteredQ}, year={2012}, url={https://reference.wolfram.com/language/RLink/ref/RDataTypeRegisteredQ.html}, note=[Accessed: 18-November-2024 ]}