search for: print_class_of_rownames

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2009 Mar 17
1
question on "row.names" attribute of dataframe when called from a compiled package
...llowing show a class attribute of "character" when using the interpreter: x <- data.frame(hat=1:10) class(rownames(x)) ## returns [1] "character" but when called from c/cpp, the rownames attribute has no class attribute, and is in fact a vector of INTSXP? > .Call("print_class_of_rownames", x, package = "test") length(x): 10 TYPEOF(x): 13 R_ClassSymbol is null. NULL > is this the intended behaviour? -Whit here is my test code: SEXP print_class_of_rownames(SEXP dataframe_sexp) { SEXP x = getAttrib(dataframe_sexp,install("row.names")); cout <&lt...