[gov2001-l] FW: [gov1000-list] sorting dataframes/matrices - Gov2001

1 Apr 2003

it pays to check out old emails sometimes ;)

-----Original Message-----
From: gov1000-list-admin(a)fas.harvard.edu
[mailto:gov1000-list-admin@fas.harvard.edu] On Behalf Of Dave Kane
Sent: Sunday, December 08, 2002 1:08 PM
To: Phillip Y. Lipscy
Cc: gov1000-list(a)fas.harvard.edu
Subject: [gov1000-list] sorting dataframes/matrices

help(sort) points you to "order". Check out the help. Here is an
example:

...
  x   a b
1 1 o
2 2 c
3 3 x
4 4 h
5 5 f
...
  x[order(x$b),]   a b
2 2 c
5 5 f
4 4 h
1 1 o
3 3 x
...
  x[order(x$a),]   a b
1 1 o
2 2 c
3 3 x
4 4 h
5 5 f
...

Dave

Phillip Y. Lipscy writes:
 > Dear all,
 ...
    > sort() works nicely for vectors but not
for dataframes and matrices
(for 
...
  matrices it doesn't sort by columns properly). 
Since even ms excel can sort 
...
  dataframes by columns, I'm assuming R can do that
too, but so far I haven't 
 > found anything that seems to let me do that.  Any ideas?
 ...
    > Thanks,
 > Phillip.
 ...
    >
-------------------------------------------------
 > Phillip Y. Lipscy
 > Perkins Hall Room #129
 > 35 Oxford Street
 > Cambridge, MA 02138
 > (617)493-4893
 > lipscy(a)fas.harvard.edu
 ...
    > Ph.D. Candidate
 > Harvard University, FAS, Department of Government
 > -------------------------------------------------
 ...

 ...

 ...

 ...

 ...
    >
_______________________________________________
 > gov1000-list mailing list
 > gov1000-list(a)fas.harvard.edu
 > http://www.fas.harvard.edu/mailman/listinfo/gov1000-list

-- 
David Kane
Lecturer in Government
617-563-0122
dkane(a)latte.harvard.edu
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