Can't Destroy Dim Names

Dear all,

I have the following matrix:
str(mat)
Named chr [1:32268] "yQAAA" "jQAAQ" "UQAAg" "FQAAw" "1QABA" ...
 - attr(*, "names")= chr [1:32268] "CAAAAAAAAA" "CAAAAAAAAC"
"CAAAAAAAAG" "CAAAAAAAAT" ...

I want to destroy the attribute yielding only this:
str(mat)
Named chr [1:32268] "yQAAA" "jQAAQ" "UQAAg" "FQAAw" "1QABA" ...

But why this command fail to do it?
dimnames(mat) <- NULL
Btw, the object size for keeping matrix with dim names is greater
than without, right?

- Gundala Viswanath
Jakarta - Indonesia
Is this what you want:
x <- c(a=1, b=2, c=3)
str(x)
Named num [1:3] 1 2 3
 - attr(*, "names")= chr [1:3] "a" "b" "c"
names(x) <- NULL
x
[1] 1 2 3

Dear all,

I have the following matrix:

str(mat)
Named chr [1:32268] "yQAAA" "jQAAQ" "UQAAg" "FQAAw" "1QABA" ...
 - attr(*, "names")= chr [1:32268] "CAAAAAAAAA" "CAAAAAAAAC"
"CAAAAAAAAG" "CAAAAAAAAT" ...

I want to destroy the attribute yielding only this:

str(mat)
Named chr [1:32268] "yQAAA" "jQAAQ" "UQAAg" "FQAAw" "1QABA" ...

But why this command fail to do it?

dimnames(mat) <- NULL
Btw, the object size for keeping matrix with dim names is greater
than without, right?

- Gundala Viswanath
Jakarta - Indonesia

______________________________________________
R-help at r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.

Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem that you are trying to solve?
Your mat variable is not a matrix, but a vector (a named vector), therefore it does not have dimensions or dimnames.

Try names(mat) <- NULL

Hope this helps,
Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.snow at imail.org
801.408.8111

> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of Gundala Viswanath
> Sent: Monday, January 12, 2009 6:32 PM
> To: r-help at stat.math.ethz.ch
> Subject: [R] Can't Destroy Dim Names
> 
> Dear all,
> 
> I have the following matrix:
> 
> > str(mat)
> Named chr [1:32268] "yQAAA" "jQAAQ" "UQAAg" "FQAAw" "1QABA" ...
>  - attr(*, "names")= chr [1:32268] "CAAAAAAAAA" "CAAAAAAAAC"
> "CAAAAAAAAG" "CAAAAAAAAT" ...
> 
> 
> I want to destroy the attribute yielding only this:
> 
> > str(mat)
> Named chr [1:32268] "yQAAA" "jQAAQ" "UQAAg" "FQAAw" "1QABA" ...
> 
> 
> But why this command fail to do it?
> 
> > dimnames(mat) <- NULL
> 
> Btw, the object size for keeping matrix with dim names is greater
> than without, right?
> 
> 
> 
> - Gundala Viswanath
> Jakarta - Indonesia
> 
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-
> guide.html
> and provide commented, minimal, self-contained, reproducible code.