Re: [R] How to speed up grouping time series, help please

From: Gabor Grothendieck <>
Date: Mon, 04 Apr 2011 11:38:07 -0400

On Mon, Apr 4, 2011 at 11:20 AM, Den Alpin <> wrote:
> I did some tests on Your and Gabor solutions, below my findings:
> - Your solution is fast as my solution in xts (below) but MUCH MORE
> READABLE, in particular I think your test should take into account xts
> creation from the data.frame (see below);
> - Gabor's solution with read.zoo is fast as xts but give an xts object
> that has some problems with time zones.

read.zoo gives a zoo object, not an xts object. If you want an xts object try as.xts(z). If you were expecting an xts object that may be the source of your other problems.

Statistics & Software Consulting
GKX Group, GKX Associates Inc.
tel: 1-877-GKX-GROUP
email: ggrothendieck at

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Received on Mon 04 Apr 2011 - 15:41:12 GMT

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