[R-sig-Geo] rasterQuad 4d object

[Agustin Lobo]

It is a sismic study: a 3d array of velocity of P waves.
I think that calcualting the 3d gradient is possible in R for small 3d arrays,
but even moderate sizes would require an extension of the current raster brick.
There might be specific tools outside R (i.e. in python), but do not
know for sure.
I've seen this package that might help:
http://cran.r-project.org/web/packages/geotopbricks/
Expert opinion on this or any other alternative tool would be appreciated,
Thanks
Agus

On Mon, Jan 12, 2015 at 4:18 PM, Michael Sumner <mdsumner at gmail.com> wrote:
> No, not afaik. What is your use case? The ones I know are
> Visualization -compelling, but hard to do well
>
> Extraction - i e copying data to points/ lines in 4d, easy but not easy to
> pre-can.
>
> It comes down to specifics.
>
> Cheers, Mike
>
> On Mon, 12 Jan 2015 20:39 Agustin Lobo <alobolistas at gmail.com> wrote:
>
>> Back in Apr 09, 2013; 8:53am
>> Robert Hijmans wrote:
>> "A RasterBrick is 3D. There is a 4D object RasterQuad designed to work with
>> the type of data you have, but I have not implemented any methods for it,
>> so it is currently of no use.../..."
>>
>> Has any further development been conducted on this RasterQuad object?
>>
>> Thanks
>>
>> Agus
>>
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