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Hello. This is not a question about a bug or even best practices; rather I'm trying to understand the philosophy or theory as to why certain portions of the R codebase are written as they are. If this question is better posed elsewhere, please point me in the proper direction. In the thread about the issues with the Tukey line, Martin said [1]: > when this topic came up last (for me) in

Here are three reasons for converting Fortran code, especially older Fortran code, to C: 1. The C-Fortran interface is not standardized. Various Fortran compilers pass logical and character arguments in various ways. Various Fortran compilers mangle function and common block names in variousl ways. You can avoid that problem by restricting R to using a certain Fortran compiler, but that can make porting R to a new platform difficult. 2. By default, variables in Fortran routines are not allocated on the stack, but are statically allocated, making recursion hard. 3. New CS graduates te...