R recycling process -

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please see snippet below:

x <- c(23,43,54,75,76,6,87,5,43,234,2) y <- c(1,2,23,43,54,75,76,6,87,1) z <- x + y

the snippet gives me warning message.when try add x , y as:

#warning message: #in x + y : longer object length not multiple of shorter object length

however when add:

x <- c(3,4,5,8) y <- c(1,3) z <- x + y z

no error message thrown , r recycles perfectly. why?

first of all, important notice warning, , not error. in either case, no error thrown , vectors added.

concerning absence of warning in second example, warning message states reason quite clearly:

object length not multiple of shorter object length

in second example, length of x twice length of y, is multiple (in contrast first example, yields warning). hence, no warning given in second example when vector y recycled.


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