[R] setting attributes

[David Winsemius]

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