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bindingIsLocked applied to a locked binding returns a 'logical' that is niether true nor false. Martin > e <- new.env() > e$x <- 1 > e$y <- 2 > lockBinding("x", e) NULL > bindingIsLocked("x", e) [1] TRUE > bindingIsLocked("x", e)==TRUE [1] FALSE > bindingIsLocked("x", e)==FALSE [1] FALSE >

Using the IRanges package from Bioconductor and somewhat recent R-2.9.1. ov = IRanges(1:3, 4:6) length(ov) # 3 seq(along = ov) # 1 2 3 as wanted seq_along(ov) # 1! I had expected that the last line would yield 1:3. My guess is that somehow seq_along don't utilize that ov is an S4 class with a length method. The last line of the *Details* section of ?seq has a typeo. Currently it is

I have a few simple questions about the usage of PROTECT, more specifically how careful one needs to be. Simple yes/no answers are fine. Most of the uses I have seen do protection when memory is allocated. But what if one just want to assign a value of another function to a variable. Say eg. that foo is a function that returns a SEXP. Would the following code be fine? SEXP bar;