R devel - Oct 2005 - Question about colnames behavior

The following code

zzz<-1:10
dim(zzz)<-10
rownames(zzz)
colnames(zzz)

yields NULL for the rownames and colnames calls.
Let us set rownames

rownames(zzz)<-1:10

Now rownames(zzz) returns the expected result, but colnames(zzz)
produces an error:
Error in dn[[2]] : subscript out of bounds

So given a onedimensional structure the return behavior of colnames
is different depending on the fact if rownames are set or not.

Should the behavior of colnames be changed to make the result
independent from this fact?



-- 
Erich Neuwirth, Didactic Center for Computer Science
University of Vienna
Visit our SunSITE at http://sunsite.univie.ac.at
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>>>>> "Erich" == Erich Neuwirth <erich.neuwirth at
univie.ac.at>
>>>>>     on Sun, 02 Oct 2005 09:39:36 +0200 writes:
    Erich> The following code
    Erich> zzz<-1:10
    Erich> dim(zzz)<-10
    Erich> rownames(zzz)
    Erich> colnames(zzz)

    Erich> yields NULL for the rownames and colnames calls.
    Erich> Let us set rownames

    Erich> rownames(zzz)<-1:10

    Erich> Now rownames(zzz) returns the expected result, but colnames(zzz)
    Erich> produces an error:
    Erich> Error in dn[[2]] : subscript out of bounds

    Erich> So given a onedimensional structure the return behavior of
colnames
    Erich> is different depending on the fact if rownames are set or not.

    Erich> Should the behavior of colnames be changed to make the result
    Erich> independent from this fact?

yes, thank you, Erich. 
It should give an error also in the 1st  case which is
BTW identical to  
    zzz <- array(1:10)

Not for R 2.2.0 though, but rather 2.2.1.

Martin