Dear R forum
Suppose I have a data.frame
df = data.frame(id = c(1:6), x = c(15, 21, 14, 21, 14, 38), y = c(36, 38, 55,
11, 5, 18), x.1 = c(15, 21, 14, 21, 14, 38), z = c(D, B, A, F, H,
P))
df
id x y x.1 z
1 1 15 36 15 D
2 2 21 38 21 B
3 3 14 55 14 A
4 4 21 11 21 F
5 5 14 5
Hi, Katherine,
IF the naming scheme of the columns of your data frame is consistently
stringwithoutdot and stringwithoutdot.number if duplicated columns
appear THEN (something like)
df[ -grep( \\., names( df))]
could help. (But it's maybe more efficient to avoid - a priori - producing
...@math.uni-giessen.de wrote:
From: Gerrit Eichner gerrit.eich...@math.uni-giessen.de
Subject: Re: [R] How to delete Identical columns
To: Katherine Gobin katherine_go...@yahoo.com
Cc: r-help@r-project.org
Date: Thursday, 28 March, 2013, 8:58 AM
Hi, Katherine,
IF the naming scheme of the columns
this might screw up the column classes of some of your columns, but it
could be enough for what you're doing :)
# start with a data frame with duplicate columns
v - data.frame(id = c(1:6), x = c(15, 21, 14, 21, 14, 38), y = c(36, 38,
55, 11, 5, 18), x.1 = c(15, 21, 14, 21, 14, 38), z = c(D, B,
5 H
#6 6 38 18 P
A.K.
- Original Message -
From: Katherine Gobin katherine_go...@yahoo.com
To: r-help@r-project.org
Cc:
Sent: Thursday, March 28, 2013 4:39 AM
Subject: [R] How to delete Identical columns
Dear R forum
Suppose I have a data.frame
df = data.frame(id = c(1:6), x
On Mar 28, 2013, at 1:39 AM, Katherine Gobin wrote:
Dear R forum
Suppose I have a data.frame
df = data.frame(id = c(1:6), x = c(15, 21, 14, 21, 14, 38), y = c(36, 38, 55,
11, 5, 18), x.1 = c(15, 21, 14, 21, 14, 38), z = c(D, B, A, F, H,
P))
df
id x yx.1 z
1 1 15 36
Katherine Gobin katherine_gobin at yahoo.com writes:
Dear R forum
Suppose I have a data.frame
Say.
[snip]
How to automatically identify and retain only one column (in this example
column x) among the identical
columns besides other non-identical columns (viz. id, y and z).
See
Yes, but the elephant in the room is:
Define: Identical.
If you do not know why this is an elephant, see FAQ 7.31.
-- Bert
On Thu, Mar 28, 2013 at 8:40 AM, Charles Berry ccbe...@ucsd.edu wrote:
Katherine Gobin katherine_gobin at yahoo.com writes:
Dear R forum
Suppose I have a
Charles Berry ccberry at ucsd.edu writes:
[snip]
Katherine Gobin katherine_gobin at yahoo.com writes:
How to automatically identify and retain only one column (in this example
column x) among the identical
columns besides other non-identical columns (viz. id, y and z).
See
?unique
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