Scan and Lists
Hi Michael
An example of your list would have helped. Anyhow, why do you want to read
a list? If you created a list object in R and want to save it and then read
it back in other session or in some other time a good option is to write an
ASCII representation of the object using dput and then recreate it using
dget i.e.
mylist= list(x=cars[,1], y=cars[,2])
dput(mylist,"mylist")
mylistback=dget("mylist")
$x
[1] 4 4 7 7 8 9 10 10 10 11 11 12 12 12 12 13 13 13 13 14 14 14 14 15
15
[26] 15 16 16 17 17 17 18 18 18 18 19 19 19 20 20 20 20 20 22 23 24 24 24 24
25
$y
[1] 2 10 4 22 16 10 18 26 34 17 28 14 20 24 28 26 34 34
46
[20] 26 36 60 80 20 26 54 32 40 32 40 50 42 56 76 84 36 46
68
[39] 32 48 52 56 64 66 54 70 92 93 120 85
If you want to read some other type of data take a look at the higher lever
functions listed under ?read.table and the functions at
library(help="foreign")
I hope this helps
Francisco
PS: Nasty weather in Fort Collins today!
From: Michael Lefsky <lefsky at gmail.com> Reply-To: lefsky at gmail.com To: r-help at stat.math.ethz.ch Subject: [R] Scan and Lists Date: Wed, 14 Sep 2005 15:06:17 -0600 This may be a newbie question - although I did search for this error message in the archives and via google and didn't see this error: The help page for "scan" indicates that among the types of data capable of being read are:
"The supported types are 'logical', 'integer', 'numeric', 'complex',
'character', 'raw' and 'list':
'list' values should have elements which are one of the first six types
listed or 'NULL'.
I have tried to use a list within a "what" list :
f <-
scan(file="c:/test/testout.csv",what=list(hi=0.0,bye="",wave=list(1:1000)),sep=",",skip=1)
and the following error is returned:
"c:/test/testout.csv", what = list(hi = 0, bye = "", :
unimplemented type 'list' in 'extractItem'
So, is my syntax confusing R, or is the documentation wrong, or is it
some other, third, option?
Thanks
M
--
Michael Lefsky
College of Natural Resources
Colorado State University
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