Tena koe Herwig I am guessing that you are not using the terms 'table' and 'list' in the R sense, and suggest you might want either the reshape() function or Hadley Wickham's 'reshape' package. For the former, if your data is in a data.frame (which is a special type of list) then:
herwig
A B C D x 10 20 30 40 y 11 21 31 41 z 12 NA 32 42
str(herwig)
'data.frame': 3 obs. of 4 variables: $ A: int 10 11 12 $ B: int 20 21 NA $ C: int 30 31 32 $ D: int 40 41 42
reshape(herwig, varying=list(1:4), direction='long',
ids=row.names(herwig),
times=names(herwig))
time A id
x.A A 10 x
y.A A 11 y
z.A A 12 z
x.B B 20 x
y.B B 21 y
z.B B NA z
x.C C 30 x
y.C C 31 y
z.C C 32 z
x.D D 40 x
y.D D 41 y
z.D D 42 z
HTH ....
Peter Alspach
-----Original Message-----
From: r-help-bounces at r-project.org
[mailto:r-help-bounces at r-project.org] On Behalf Of herwig
Sent: Wednesday, 1 April 2009 9:03 a.m.
To: r-help at r-project.org
Subject: [R] convert table to list
Hi there,
This is probably a rather simple question - but I was not
able to solve it so far.
I would like to convert the following table:
A B C D
x 10 20 30 40
y 11 21 31 41
z 12 32 42
to a list with three columns like:
A x 10
A y 11
A z 12
B x 20
.
.
.
Any hints how do do this in R would be very much apprechiated.
cheers,
Herwig
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