Minimum Convex Polygon

?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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