space - time SpatialPixels dataframe
On 09/27/2011 10:35 AM, Peter van Horssen wrote:
Hi all, I have an irregular (space-time) dataset with counts per 'gridcell'
> data2.pts.sum[1:10,]
coordinates datum sum 1 (-9375, 480625) 2010-11-29 1 2 (5375, 530375) 2011-01-28 1 3 (21875, 529375) 2010-11-29 1 4 (25625, 396875) 2010-02-10 1 5 (26375, 396875) 2010-02-10 9 6 (26625, 418125) 2011-05-12 1 7 (28125, 419875) 2006-02-16 1 8 (28375, 524125) 2011-01-28 1 9 (28875, 418375) 2005-02-10 3 10 (29375, 409125) 2010-04-22 5 What I like to end up with is a _full grid_ STFDF. I have created a spatialpixelsdataframe and then applying fullgrid(spdf)<-TRUE but this creates, obviously, 'NAS' in dates and data. The question is how to proceed. Creating (manually) a file with all spatial locations and all dates (19257 x 75) and then matching data to it ? Or is there a smarter solution? (e.g is it somehow possible to use fullgrid on a STIDF/STFDF? )
Hi Peter, right now, ST* classes do not have a fullgrid method, but I will think about it. Anyway, they would be another way of coercion, as in as(x, "STFDF") which is how the vignette tells you how to do it. For constructing STFDF objects, you can use constructor functions STIDF(), STSDF() and STFDF(), or alternatively stConstruct(); all have documentation, and examples in the vignette. Bests,
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