R extension in C
On Thu, 19 Jul 2001, Joe Conway wrote:
Hello, I'm trying to modify the RPgSQL R extension, in part as a learning experience on how R is extended. Specifically I'm writing a new function which attempts to create a data.frame in C, and pass it back to R. The key word is "attempts" in this last sentence. I haven't been able to get it right, and I've not found many good examples or a comprehensive description of the requirements. The closest I've found is do_modelframe in model.c and the "Writing R Extensions" document. They were a good start, but didn't quite get me there. Can anyone point me toward some other examples/documents?
Some of the functions in the 'foreign' package create data frames entirely in C, eg read.dta()
-thomas
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