Please forgive me if my question is answered in Help FAQ no. 23481739... In language like C every variable must be declared before it can be used. In VBA, if a variable has not been declared it is assumed to be of a special type (Variant). In R (and Matlab) variables do not have to be declared. This is convenient, but in a large program one can make a typo which will be extremely difficult to find. In VBA one can use a special statement (Option Explicit) which does not allow using variables which have not been previously declared. As far as I remember this can also be done in Matlab (or at least there is a utility which can check whether your program uses undeclared variables).
My question is: does such an option/utility exist in R? Thank you. Moshe. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
