Your data will probably be a lot easier to work with if you put it in this form:
X Y Rainfall Date 6.25 43.75 189 10/1972 6.25 44.25 153 10/1972 ... (Or leave off the date column and still keep a separate object for each set of observations, whichever makes more sense for you). To get the data in this form, unless you have a better way, you'll probably want to write some kind of for loop to loop over the row and column names of your data (I think the functions are called rownames and colnames for this). Once you get the data in the format above, you can use the plot or maybe spplot functions with the X and Y coordinate vectors (data$X and data$Y), after creating some kind of colored index based on the rainfall. The package RColorBrewer or just the standard rainbow() function will probably help with creating colors. Hope this helps somewhat. -James Nylen On Wed, Oct 8, 2008 at 5:52 AM, Alexandre VILLERS < [EMAIL PROTECTED]> wrote: > Good afternoon (even if it might be morning or evening for some of you), > > The question might appear ordinary. > I have a large dataset where such dataframe is repeated > > Oct 1972 6.25 6.75 7.25 7.75 8.25 > 43.75 189 210 190 155 140 > 44.25 153 163 174 164 160 > 44.75 110 98 99 114 128 > 45.25 58 52 56 75 86 > 45.75 42 39 42 57 67 > > with *rainfall values* for a given Month Year in function of (xy)coordinates. > I isolated each data.frame in an object but how can I turn this into a > raster image with the appropriate coordinates > Don't need (for the moment !) to write me down the code but just let me > know which packages or funtion I could use. > (the idea is then to link those values to birds' nests locations). > Best regards > > Alex > > > -- > > Alexandre Villers > PhD Student > Team "Biodiversity" > CEBC-CNRS UPR1934 > 79360 Beauvoir sur Niort > > Phone +33 (0)5 49 09 96 13 > Fax +33 (0)5 49 09 65 26 > > > > __________ Information from ESET Mail Security, version of virus signature > database 3503 (20081008) __________ > > The message was checked by ESET Mail Security. > http://www.eset.com > > part000.htm - is OK > > _______________________________________________ > R-sig-Geo mailing list > R-sig-Geo@stat.math.ethz.ch > https://stat.ethz.ch/mailman/listinfo/r-sig-geo > > [[alternative HTML version deleted]] _______________________________________________ R-sig-Geo mailing list R-sig-Geo@stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-sig-geo
