Message-ID: <51CC1522.5030302@uni-muenster.de>
Date: 2013-06-27T10:34:10Z
From: Edzer Pebesma
Subject: How to compute an average year on time series ?
In-Reply-To: <51CBFE31.2070004@orange.fr>
Given your data are in obj, did you try
mean.yrs = aggregate(obj, "year", mean)
?
On 06/27/2013 10:56 AM, Nicolas Bories wrote:
> Dear all,
>
> I'm working on EVI-MODIS time series with the R package spacetime.
> I have 10 years of data. I want to compute an average year for each pixel.
> How can I do this ?
> The goal is to compare for each pixel and for specific years the
> EVI-MODIS variations and average year variations.
> I saw the method aggregate(x, by, FUN = mean, ..., simplify = TRUE) but
> I didn't manage to get an average year.
>
> Thanks in advance for any suggestions !
>
> Nicolas.
>
>
> [[alternative HTML version deleted]]
>
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--
Edzer Pebesma
Institute for Geoinformatics (ifgi), University of M?nster
Weseler Stra?e 253, 48151 M?nster, Germany. Phone: +49 251
83 33081, Fax: +49 251 8339763 http://ifgi.uni-muenster.de