[R] How to define new operator in R?

Hello, everyone! Does anyone know how make some symbols have special means in R? For example, we know that "+" in R means the sum of the two operand on its left and right. I want to define some operators in R by myself. Is this possible? Regards! -- Chuanlong Du Department of Stati

[R] How can we modify attributes of files in Windows Systems using R?

Hello! Does any one know how to modify attributes of files (hide, read only and etc) in Windows Systems using R? I tried to use shell to call system command, but it seems that it doesn't work well. Sometimes it works but sometimes not. Regards! -- Chuanlong Du Department of Statistcis

[R] Is there a function to save the content in R console to some file?

Hello, everyone! Does anyone know whether there's a function in R which can save the content in R console to some file? I'm using Windows system and the usual R console instead of Rstudio. Regards! -- Chuanlong Du Department of Statistcis Iowa State University Ames, IA