Dear Amao, It's not clear how the "hundreds of species" come into the play. Do you want a map for each species? Or rather a single map that combines the species info.
ggplot2() has AFAIK no options to restrict the output of stat_bin2d() to a polygon. Best regards, ir. Thierry Onkelinx Instituut voor natuur- en bosonderzoek / Research Institute for Nature and Forest team Biometrie & Kwaliteitszorg / team Biometrics & Quality Assurance Kliniekstraat 25 1070 Anderlecht Belgium To call in the statistician after the experiment is done may be no more than asking him to perform a post-mortem examination: he may be able to say what the experiment died of. ~ Sir Ronald Aylmer Fisher The plural of anecdote is not data. ~ Roger Brinner The combination of some data and an aching desire for an answer does not ensure that a reasonable answer can be extracted from a given body of data. ~ John Tukey 2016-01-15 18:00 GMT+01:00 Amao Abduljamiu <[email protected]>: > Dear All, > > I need help with 2d- Density plots (ggplot2)... > > I'm trying to plot ecological distribution of some species of organisms i'm > studying over the Arabian/Persian Gulf. Here is a sample of code i've > tried, > > Backround layer > > nc <- get_map("Persian Gulf", zoom = 6, maptype = 'terrain', language = > "English") > ncmap <- ggmap(nc, extent = "device") > > Other layers > > ncmap+ > stat_density2d(data=sample.data3, aes(x=long, y=lat, fill=..level.., > alpha=..level..),geom="polygon")+ > geom_point(data=sample.data3, aes(x=long, y=lat))+ > geom_point(aes(x =50.626444, y = 26.044472), color="red", size = 4)+ > scale_fill_gradient(low = "green", high = "red") + scale_alpha(range = > c(0.00, 0.25), guide = FALSE) > > but , i will like to use the stat_density2d to show the distributions of > hundreds of species (which are recorded in columns e.g SP1....SPn) over the > water body rather than just displaying latitude and longitude. > > Also, is it possible to restrict my heat map to just the water body ? I'll > appreciate any help and recommendations i can get on this please > > I will also appreciate any suggestion on alternative way to achieve this. > > > Here is a link to stackoverflow where I initially asked the question with > an > image of what the problem look like. > > > http://stackoverflow.com/questions/34569152/ggplot-stat-density2d-plots-for- > ecological-distribution > > Sincerely > Amao > ------------------------------------------- > Amao Abduljamiu O. > PhD Candidate - Geology > Earth Sciences Department > King Fahd University of Petroleum and Minerals (KFUPM) > Dhahran, Saudi Arabia > P. O. Box 1723 KFUPM, Dhahran 31261 Saudi Arabia > Tel. office +966 3 860 3240 > Mobile: +966 535467527 > Skype: lakesido02 > Email: [email protected] > Alt: [email protected] > > _______________________________________________ > R-sig-Geo mailing list > [email protected] > https://stat.ethz.ch/mailman/listinfo/r-sig-geo > [[alternative HTML version deleted]] _______________________________________________ R-sig-Geo mailing list [email protected] https://stat.ethz.ch/mailman/listinfo/r-sig-geo
