[R-sig-Geo] help with 2d- Density plots (ggplot2)

[Amao Abduljamiu]

Yes Sir, my plan is to have several maps .i.e a map for each species. 

Sent from my iPad

> On Jan 16, 2016, at 10:18 PM, Thierry Onkelinx <thierry.onkelinx at inbo.be> wrote:
> 
> 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 <lekisoft at gmail.com>:
>> 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: amao at kfupm.edu.sa
>> Alt: lekisoft at gmail.com
>> 
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