[R] Problem with merging two zoo objects

Megh megh700004 at yahoo.com
Fri Oct 15 22:27:06 CEST 2010


Thanks Gabor for pointing to my old version. However I got one more question
why the argument tz="" is sitting there? As you are not passing any explicit
value for that, I am assuming it is redundant. Without any tz argument, I
got following:


head(read.zoo(file="f:/dat1.txt", header=T, sep=",", format = "%m/%d/%Y
%H:%M:%S"))
           data.open data.high data.low data.close
2010-10-15      73.7      73.7     73.7       73.7
2010-10-15      73.8      73.8     73.8       73.8
2010-10-15      73.8      73.8     73.8       73.8
2010-10-15      73.8      73.8     73.8       73.8
2010-10-15      73.8      73.8     73.8       73.8
2010-10-15      73.8      73.8     73.8       73.8
Warning messages:
1: In zoo(rval3, ix) :
  some methods for “zoo” objects do not work if the index entries in
‘order.by’ are not unique
2: In zoo(rval, x.index[i]) :
  some methods for “zoo” objects do not work if the index entries in
‘order.by’ are not unique
> packageDescription("zoo")
Package: zoo
Version: 1.6-4
Date: 2010-07-09
Title: Z's ordered observations
Author: Achim Zeileis, Gabor Grothendieck, Felix Andrews
Maintainer: Achim Zeileis <Achim.Zeileis at R-project.org>
Description: An S3 class with methods for totally ordered indexed
observations. It is particularly aimed
           at irregular time series of numeric vectors/matrices and factors.
zoo's key design goals are
           independence of a particular index/date/time class and
consistency with ts and base R by
           providing methods to extend standard generics.
Depends: R (>= 2.10.0), stats
Suggests: coda, chron, DAAG, fCalendar, fSeries, fts, its, lattice,
strucchange, timeDate, timeSeries,
           tis, tseries, xts
Imports: stats, utils, graphics, grDevices, lattice (>= 0.18-1)
LazyLoad: yes
License: GPL-2


Clearly the format argument is not working properly, the "time" component is
missing. Why it is so?
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