Message-ID: <200505312244.j4VMhwcX022091@meitner.gene.com>
Date: 2005-05-31T22:43:58Z
From: Bert Gunter
Subject: why is it numeric(0)?
In-Reply-To: <200505312222.j4VMMG3D027976@hypatia.math.ethz.ch>
?numeric
Hint: Type numeric(0) and numeric(1) at the prompt and see what you get.
What is the sum of anything and a zero length vector?
-- Bert Gunter
Genentech Non-Clinical Statistics
South San Francisco, CA
"The business of the statistician is to catalyze the scientific learning
process." - George E. P. Box
> -----Original Message-----
> From: r-help-bounces at stat.math.ethz.ch
> [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of luan_sheng
> Sent: Tuesday, May 31, 2005 3:22 PM
> To: r-help at stat.math.ethz.ch
> Subject: [R] FW: why is it numeric(0)?
>
> 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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