Hi there seems to be an error in the documentation of the "merge" function:
Arguments: x, y: data frames, or objects to be coerced to one. by, by.x, by.y: specifications of the common columns. See Details. all: logical; all = L is shorthand for all.x = L and all.y = L. The "L" should be a T or a TRUE. Cheers, Rainer -- Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation Biology, UCT), Dipl. Phys. (Germany) Centre of Excellence for Invasion Biology Stellenbosch University South Africa Tel : +33 - (0)9 53 10 27 44 Cell: +33 - (0)6 85 62 59 98 Fax (F): +33 - (0)9 58 10 27 44 Fax (D): +49 - (0)3 21 21 25 22 44 email: rai...@krugs.de Skype: RMkrug [[alternative HTML version deleted]]
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