"if" function in pure R?
Hi all, Could anyone refer to me to a good source to learn how to program a simple control-flow construct* in R, or provide me with a simple example? Control-flow constructs are programmed as primitives, but I would like to be able to do that (if possible) in pure R. The general context is that those functions are a mystery to me. The motivating example is that I would like to create a function that behave similarly to base::`if` with an extra argument to the function (e.g. to include an error rate on the condition). Many thanks, Alex * control-flow constructs are functions such as if, for, while... that allow for call of the form fn(x) expr to work (see ?Control).
Alexandre Courtiol http://sites.google.com/site/alexandrecourtiol/home *"Science is the belief in the ignorance of experts"*, R. Feynman [[alternative HTML version deleted]]