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2006 Mar 27
3
seq(2,5,-2) not an error but NULL
Hi,
This may belong more to r-develop, but general discussion may be useful
(for the how many-th time ?)
seq(2,5,-2)
seq(5,2,2)
both result in
Error in seq.default(2, 5, -2) : wrong sign in 'by' argument
But often, if not always, mathematicians and programmers want a
behaviour e.g. in for loops, where this statement results in an empty
statement, that is
for (ii in seq(2,5,-2))