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space - time SpatialPixels dataframe
2 messages · Peter van Horssen, Edzer Pebesma
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,
greetings Peter -- ================================ Peter van Horssen Bureau Waardenburg bv Adviseurs voor ecologie& milieu Postbus 365 4100 AJ Culemborg Tel: 0345-512710 Fax: 0345-519849 e-mail:p.w.van.horssen at buwa.nl ================================ ---------------------------- DISCLAIMER -------------------------- De informatie verzonden met dit e-mail bericht is uitsluitend bestemd voor de geadresseerde. Openbaarmaking, vermenigvuldiging, verspreiding en/of verstrekking aan derden is niet toegestaan. Gebruik van deze informatie door anderen dan de geadresseerde is verboden. U wordt verzocht bij onjuiste adressering de afzender direct te informeren door het bericht te retourneren. P denk aan het milieu voordat u dit bericht print
Edzer Pebesma Institute for Geoinformatics (ifgi), University of M?nster Weseler Stra?e 253, 48151 M?nster, Germany. Phone: +49 251 8333081, Fax: +49 251 8339763 http://ifgi.uni-muenster.de http://www.52north.org/geostatistics e.pebesma at wwu.de