[R-sig-Geo] Raster multi-band time series analysis

[Loïc Dutrieux]

Hi Victor,

I don't have much experience with beginCluster; however, I have written 
a parallel version of raster::calc a little while ago that uses forking.
https://github.com/dutri001/bfastSpatial/blob/master/R/mc.calc.R

calc and overlay are analogue so that it shouldn't be too hard to extend 
this function to overlay, using an undefined number of rasterStack or 
Bricks as input. You will need a bit more checks and control flow at the 
beginning of the function though.
I'm not sure at all whether this is the most efficient way of 
parallelizing things, but it will for sure speed up your processing 
compared to single core processing.

Hope this helps,
Cheers,
Loïc

On 10/26/2015 12:23 PM, Victor Maus wrote:
> Hi Loïc,
>
> Thank your very much for your answer. I am working on your suggestion.
> But I still have a question.
>
> The function raster::overlay works for multiple RasterBrick objects.
> However, I noticed that raster::beginCluster works with raster::overlay
> as long as a single RasterStack or RasterBrick is provided as the first
> argument. Do you have any suggestion for parallel processing of multiple
> RasterBrick objects?
>
> Thank you!
>
> Best,
> Victor