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Hello, all, It is a general question, but I couldn't find the answer elsewhere. I am using an R function using .C but don't understand one of its behaviors without the C code. I am wondering the so-called 'open source'. It doesn't include the C code together with the R function, does it? So what I want to ask is whether it is justified, possible or polite to ask for the C

Hello all, I have a data frame in R, imported from an excel file in Swedish. The original file contains several columns that have special characters, such as \¨{a}, \¨{o}, and so on. After import such special characters are represented in the data frame by "\\345", "\\366" etc (don't ask me why). For example, a word "Hårkan" becomes ''H\\345rkan".

Hello, all, I had problems with an extension to a classic optimization problem. The target is to minimize a quadratic form a'Ma with respect to vector b, where vector a=(b',-1)', i.e., a is the expand of b, and M is a symmetric matrix (positive definite if needed). One more constrain on b is b'b=1. I want to solve b given M. I tried but it seems impossible to find an analytic

Hello, S-plus and R helpers,(sorry for cross-post) I wrote some simple C code for one likelihood to be optimized (using optim(MASS)). I use same function, same data, same starting points and same DLL in R and S-plus for comparison. (I compiled it with 'Rcmd SHLIB likelihood.c' and the header files of it include only R.h and math.h). While it works quite fine in S-plus, it forever returns