[R] how to calculate length of each triangulated face in deldir

uday uday_143_4u at hotmail.com
Sun Jan 29 21:50:49 CET 2012


Hi, 
I have some data 

data=read.table("SCI.was" ,header=TRUE)

sci_lat=data[,7] # latitude
temp_lon=data[,8] # longitude
# the longitude data is in 360 degree format need to convert to -180 to 180
sci_lon= ((temp_lon+180) %% 360 ) -180

m <-cbind(sci_lon,sci_lat)
dist <- spDistsN1(m, m[1,], longlat=TRUE)
hist(dist[2:9997])
try <- deldir(sci_lon,sci_lat)
try_p <- deldir(sci_lon,sci_lat,plot=TRUE,wl='tr') 

Now I would like to calculate the length of each triangulated face , could
somebody please tell me how to calculate it ?


Cheers 
Uday 
              

 

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