[R-sig-Geo] How to compute an average year on time series ?

[Edzer Pebesma]

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.
> 
> 
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-- 
Edzer Pebesma
Institute for Geoinformatics (ifgi), University of Münster
Weseler Straße 253, 48151 Münster, Germany. Phone: +49 251
83 33081, Fax: +49 251 8339763 http://ifgi.uni-muenster.de