69 lines
2.2 KiB
R
69 lines
2.2 KiB
R
SigLocs <-
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function(mobmat,obj,CENTERRAD=125,MINPAUSETIME=600,tz=""){
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if(length(obj$ID2)==0){
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warning("No pauses in mobmat within function SigLocs!")
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return(NULL)
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}else if(length(obj$ID2)==1){
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outmat=data.frame('x'=mobmat[obj$ID2[1],2],'y'=mobmat[obj$ID2[1],3],'timepresent'=c(0),'home'=c(1))
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nrowfc=1
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}else{
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ptred=floor(obj$pt/MINPAUSETIME)
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if(length(which(ptred>0))<2){
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warning("No pauses long enough in mobmat within function SigLocs!")
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return(NULL)
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}
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pmat=c()
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for(i in 1:length(obj$ID2)){
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if(ptred[i]>0){
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pmat=rbind(pmat,matrix(rep(mobmat[obj$ID2[i],2:3],ptred[i]),ncol=2,byrow=T))
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}
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}
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kmeansk_v=2:length(which(ptred>0))
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lsfit = list()
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for(i in 1:length(kmeansk_v)){
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kmeansk = kmeansk_v[i]
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fit = kmeans(pmat,centers=kmeansk)
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lsfit[[i]]=fit
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if(min(dist(fit$centers))<CENTERRAD*2 || i==length(kmeansk_v)){
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if(i>1){
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kmeansk=kmeansk_v[i-1]
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fit = lsfit[[i-1]]
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}
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break
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}
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}
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nrowfc = nrow(fit$centers)
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outmat=data.frame('x'=fit$centers[,1],'y'=fit$centers[,2],'timepresent'=rep(0,nrow(fit$centers)),'home'=rep(0,nrow(fit$centers)))
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}
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#Determine time spent at these significant locations
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for(i in 1:length(obj$ID2)){
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for(j in 1:nrowfc){
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if(sqrt((mobmat[obj$ID2[i],2]-outmat$x[j])^2+(mobmat[obj$ID2[i],3]-outmat$y[j])^2)<CENTERRAD){
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outmat[j,3]=outmat[j,3]+obj$pt[i]
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}
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}
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}
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#Determine which is home (where is the night spent)
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for(i in 1:length(obj$ID2)){
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xx=as.POSIXct((mobmat[obj$ID2[i],7]+mobmat[obj$ID2[i],4])/2,tz=tz,origin="1970-01-01")
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hourofday = as.numeric(strsplit(strsplit(as.character(xx),":")[[1]][1]," ")[[1]][2])
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if(hourofday>=21 || hourofday<6){
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for(j in 1:nrowfc){
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if(sqrt((mobmat[obj$ID2[i],2]-outmat$x[j])^2+(mobmat[obj$ID2[i],3]-outmat$y[j])^2)<CENTERRAD){
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outmat[j,4]=outmat[j,4]+obj$pt[i]
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}
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}
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}
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}
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IDmax =order(outmat[,4],decreasing=T)[1]
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outmat[,4]=rep(0,nrow(outmat))
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outmat[IDmax,4]=1
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outmat=outmat[order(outmat[,3],decreasing=T),]
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IDrm=which(outmat[,3]==0)
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if(length(IDrm)>0){
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outmat=outmat[-IDrm,]
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}
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rownames(outmat)=NULL
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return(outmat)
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}
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