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