72 lines
1.7 KiB
R
72 lines
1.7 KiB
R
ExtractFlights <-
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function(mat,r,w){
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out = c()
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if(!is.matrix(mat)){
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out=matrix(c(3,mat[1],mat[2],mat[3],NA,NA,NA),nrow=1)
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colnames(out)=c("code","lon1","lat1","t1","lon2","lat2","t2")
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return(out)
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}
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nextline = rep(NA,6)
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nextline[1:3]=mat[1,]
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curind = 1
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while(TRUE){
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nexind = curind+1
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if(nexind==nrow(mat)){
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nextline[4:6]=mat[nexind,]
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out=rbind(out,nextline)
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break
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}
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while(TRUE){
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if(!IsFlight(mat[curind:nexind,],r,w)){
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break
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}
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nexind=nexind+1
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if(nexind>nrow(mat)){
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break
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}
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}
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if(nexind==curind+1 && curind!=nrow(mat)){
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nextline[3]=mat[nexind,3]
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mat=mat[-nexind,]
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}else{
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nextline[4:6]=mat[nexind-1,]
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out=rbind(out,nextline)
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nextline=rep(NA,6)
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curind=nexind-1
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nextline[1:3]=mat[curind,]
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}
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if(nexind>nrow(mat)){break}
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}
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outp=c()
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if(out[1,3]>min(mat[,3])){
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outp=rbind(outp,c(2,out[1,1],out[1,2],min(mat[,3]),NA,NA,out[1,3]))
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if(nrow(out)==1){
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outp[1,7]=out[1,6]
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return(outp)
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}
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}
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if(nrow(out)==1){
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outp=rbind(outp,c(1,out))
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return(outp)
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}
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for(i in 1:(nrow(out)-1)){
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outp=rbind(outp,c(1,out[i,]))
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if(out[i,6]<out[i+1,3]){
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outp=rbind(outp,c(2,out[i,4],out[i,5],out[i,6],NA,NA,out[i+1,3]))
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}
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}
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# convert flights with distance 0 into pauses
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IDf=which(outp[,1]==1)
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IDp=which((outp[IDf,2]-outp[IDf,5])^2+(outp[IDf,3]-outp[IDf,6])^2==0)
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if(length(IDp)>0){
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for(i in 1:length(IDp)){
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outp[IDf[IDp[i]],1]=2
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outp[IDf[IDp[i]],5]=NA
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outp[IDf[IDp[i]],6]=NA
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}
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}
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outp=rbind(outp,c(1,out[nrow(out),]))
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colnames(outp)=c("code","lon1","lat1","t1","lon2","lat2","t2")
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return(outp)
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}
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