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Hi, Hope you are well. I was wondering if there is a function at C level that is equivalent to mtcars$carb or .subset2(mtcars, "carb"). If I have the index of the column then the answer would be VECTOR_ELT(df, asInteger(idx)) but I was wondering if there is a way to do it directly from the name of the column without having to loop over columns names to find the index? Thank you Best

...ed in Defn.h, which AFAIK is not part of the exported R API. Looking at the code for `get1index()` it looks like it just loops over the (translated) names, so I guess I just do that [0]. [0]: https://github.com/r-devel/r-svn/blob/1ff1d4197495a6ee1e1d88348a03ff841fd27608/src/main/subscript.c#L226-L235 On Wed, Jun 17, 2020 at 6:11 AM Morgan Morgan <morgan.emailbox at gmail.com> wrote: > Hi, > > Hope you are well. > > I was wondering if there is a function at C level that is equivalent to > mtcars$carb or .subset2(mtcars, "carb"). > > If I have the index o...

I came across a weird-looking use of LLVM_FALLTHROUGH which I think is completely spurious, but I figured I should check with the group mind before ripping it out. Basically, if you have multiple cases with no code in between, you do *not* need LLVM_FALLTHROUGH, right? switch (Foo) { case Bar1: LLVM_FALLTHROUGH; // not needed case Bar2: some code; return; case Bar3:

>>That boot_params.hdr.code32_start field is probably either invalid (bad reloc or something else causing the bootloader to >>calculate the wrong address) or valid but the thing it thinks it is pointing to wasn't loaded (missing PT_LOAD etc.). >boot_params.hdr.code32_start field is valid :) It is 0x100000, like expected > >Then I suspect that that segment isn't being