[R] FW: why is it numeric(0)?

[luan_sheng]

hello,everyone. I have one question:

example 1
> x=numeric(0)
> y=5
> print(x+y)
numeric(0)
 
example 2
> x=numeric(1)
> y=5
> print(x+y)
[1] 5

why the print(x+y)  is numeric(0) at the first example, but the result is 0
at the second example? 


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