R help - Nov 2005 - about sorting table

hi all,

I load a table with headers that enable me to acces it by the column names:

tab<-read.table("blob/data.dat",h=T)
attach(tab)

everythings are OK, but i try to sort this table against one of his column like
this:

tab<-tab[order(tab$IndexUI),];

It is still ok, the table is sorted, if i type "tab" i see a sorted
table.

but, when i call the column by their names, it appears that the column isn't
sorted...

I believe that, is there a solution to attach column names another time, to
reflect the effect of sorting this table?

thks all for your answers

guillaume.

herodote at oreka.com wrote:
> hi all,
> 
> I load a table with headers that enable me to acces it by the column names:
> 
> tab<-read.table("blob/data.dat",h=T)
> attach(tab)
> 
> everythings are OK, but i try to sort this table against one of his column
like this:
> 
> tab<-tab[order(tab$IndexUI),];
> 
> It is still ok, the table is sorted, if i type "tab" i see a
sorted table.
> 
> but, when i call the column by their names, it appears that the column
isn't sorted...
> 
> I believe that, is there a solution to attach column names another time, to
reflect the effect of sorting this table?
> 
> thks all for your answers

see ?colnames

Uwe Ligges

> guillaume.
> 
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