Displaying 2 results from an estimated 2 matches for "y_utm".
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2006 Oct 07
1
random point in a circle centred in a geographical position
...couldn?t find any)
2. Do you think the code bellow produces uneven locations?
3. Any suggestions to programme the ?rejection method?? Maybe someone has already used it...
Cheers
albert
#Code random location in a circle
# Generate UTM coordinates (original location)
> x_utm<-c(289800)
> y_utm<-c(4603900)
> coord<-as.data.frame(cbind(x_utm,y_utm))
# Generate a random radius with a maximum distance of 1000 meters from the original location.
>radius<-runif(1,0,1000)
# Generate a random angle
>angle<-runif(1,0,360)
#Generate a random x coordinate
>x_rdm<-coord$x_u...
2007 Feb 27
0
Optimizing the loop for large data
...d p=10.
Here is what I wrote so far, but seems to be inefficient. I appreciate
if someone help me out.
library(foreign)
library(MASS)
D<-read.dbf('data/Indianapolis015.dbf') # import a data
# data looks like this
LONGLAB X Y Perimeter Area X_UTM
Y_UTM F0 F1 F2
1 TAZ 18011:1000 -86.25985 39.95286 2.061630 0.1862549 50600.38
4435792 235 0 35
2 TAZ 18011:1001 -86.31030 39.97591 3.657006 0.7305006 46440.80
4438608 0 0 0
3 TAZ 18011:1002 -86.29542 39.97054 3.516089 0.6408084 47677.31
4437936 155 0 15
4 TAZ 18011:1003 -86.2...