Hi All, I try to empoly Monte Carlo to find out the distribution of my data. The code is following library(sp) library(rgdal) library(raster) x<-readOGR(".", "finance") #get one spatial file N.list<-list() for(i in 1:1000){ Sample.x<-sample(1:7059,600) #the shp file includes 7059 points£¬and I want get 600 of them by random sample Point.x<-x[Sample.x,] # get 600 points distance.x<-pointDistance(Point.x,lonlat=FALSE) #Calculate the distance between any two points 600 y<-distance.x/1000 # the Unit is meter, but I want it become kilometer y<-round(y,0) # split.point=seq(min(y),max(y),by=1) result<-hist(y,breaks=split.point) #get the frequency of each distance N.list[[i]]<-result$counts #put the result into the list } if without loop, the code is right. But the loop construct is important. The error ls: Error in x@coords[i, , drop = FALSE] : subscript out of bounds
Jiaming Li [[alternative HTML version deleted]]
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