[R] setting attributes

[Stephen Liu]

Hi David,

I'm learning R following the tutorial mentioned, nothing else.  I got an error 
running the code.  Please help.

B.R.
Stephen L




----- Original Message ----
From: David Winsemius <dwinsemius at comcast.net>
To: Stephen Liu <satimis at yahoo.com>
Cc: r-help at r-project.org
Sent: Fri, November 5, 2010 12:18:23 PM
Subject: Re: [R] setting attributes


On Nov 5, 2010, at 12:05 AM, Stephen Liu wrote:

> Hi folks,
>
> An Introduction to R
>
> 3.3 Getting and setting attributes
> http://cran.r-project.org/doc/manuals/R-intro.html#Vectors-and-assignment
>
>> z <- 0:9
>> z
> [1] 0 1 2 3 4 5 6 7 8 9
>
>> attr(z, "dim") <- c(10,10)
> Error in attr(z, "dim") <- c(10, 10) :
>  dims [product 100] do not match the length of object [10]
>
> Please help me to understand what mistake I committed?  TIA

If you want a 10 x 10 matrix then:

zm <- matrix(z, 10, 10)  # positional arguments to nrow and ncol.

If you were trying for something else, then please explain in plain  
English rather than simply showing code that throws an error.

David Winsemius, MD
West Hartford, CT