Hi all, I got these set of codes to compute mcp which worked well in drawing the polygons but I don't have any idea about how the get the areas of the various polygons calculated for each study site. Here is what I did using version 2.15.2; data for location 1 attached with mail.
library(ggplot2)
library(plyr)
##Location 1
mcpyankari<-read.csv("mcpyankari.csv")
head(mcpyankari)
find_hully <- function(mcpyankari) mcpyankari[chull(mcpyankari$long,
mcpyankari$lat), ]
hullsy <- ddply(mcpyankari, "mcpyankari$Individual", find_hully)
plot <- ggplot(data = hullsy, aes(x = long, y = lat, colour=Individual, fill =
Individual)) +
geom_point() + geom_polygon(data = hullsy, alpha= 0.5) + labs(x = "Longitude",
y = "Latitude")
plot
##Location 2
mcpkainji<-read.csv("mcpkainji.csv")
head(mcpkainji)
find_hullk <- function(mcpkainji) mcpkainji[chull(mcpkainji$long,
mcpkainji$lat), ]
hullsk <- ddply(mcpkainji, "mcpkainji$Individual", find_hullk)
plot <- ggplot(data = hullsk, aes(x = long, y = lat, colour=Individual, fill =
Individual)) +
geom_point() + geom_polygon(data = hullsk, alpha = 0.5) + labs(x =
"Longitude", y = "Latitude")
plot
Thanks
Chima
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mcpyankari.csv
Description: MS-Excel spreadsheet
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