Thank you Tal, useful link. Best, Aurelie On 2012-03-09, at 11:53 AM, Tal Galili wrote:
> Hi Aurelie, > Please give this a look: > http://www.nealgroothuis.name/introduction-to-data-types-and-objects-in-r/ > > And see if this resolves most, or all, of your questions... > > > ----------------Contact > Details:------------------------------------------------------- > Contact me: tal.gal...@gmail.com | 972-52-7275845 > Read me: www.talgalili.com (Hebrew) | www.biostatistics.co.il (Hebrew) | > www.r-statistics.com (English) > ---------------------------------------------------------------------------------------------- > > > > > On Fri, Mar 9, 2012 at 5:48 PM, Aurelie Cosandey Godin <god...@dal.ca> wrote: > Dear all, > > I'm trying to create a list of point patterns ppp.object {spatstat} in a loop. > My dataset looks like this: > > > names(OT1);head(OT1);dim(OT1) > [1] "EID" "latitude" "longitude" "month" "year" "CPUE" > "TSUM" > [8] "fTSUM" > EID latitude longitude month year CPUE TSUM fTSUM > 1 167-1-1996-1135 67.70000 -61.81667 9 1996 0 0 F > 2 167-10-1996-1135 67.71667 -59.18333 9 1996 0 0 F > 3 167-100-1996-1135 67.86667 -59.43333 10 1996 0 0 F > 4 167-101-1996-1135 67.95000 -59.58333 10 1996 0 0 F > 5 167-102-1996-1135 68.10000 -59.76667 10 1996 0 0 F > 6 167-103-1996-1135 67.81667 -59.38333 10 1996 0 0 F > [1] 2707 8 > > What I would like to do is to select data for each of my month and create a > ppp.object. > > > sort(unique(OT1$month)) > [1] 7 8 9 10 11 12 > > The following loop works and I can see each of my figures: > > for(i in sort(unique(OT1$month))){ > a<-OT1[OT1$month==i,] > b<-ppp(a$longitude,a$latitude,marks=a$fTSUM,window=newW) > plot(b,main=i) > } > > How can I access each of my ppp.objects? I've tried adding a list() in the > loop command such that I can access the data but without any success... Any > help would be much appreciated! > > Thank you! > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
