hi
im phd student in climatologyi have a question in r can u help me?i work with
netcdf data in r,i have to calculate IVT(attached file)my data is from 1988-
2015in each year i have 1 month1-31(days)
years<-c(1988:2015)for(i in 1:28) #iteration on
yearsivt<-nc_open(paste("c:/users/ahoora/desktop/ivt/",years[i],".nc",sep=""),write=FALSE,readunlim
= FALSE,verbose=FALSE)
longitude <- ncvar_get(ivt,varid="longitude")latitude <-
ncvar_get(ivt,varid="latitude")level <- ncvar_get(ivt,varid="level")time <-
ncvar_get(ivt,varid="time")
LonIdx <- which(ivt$dim$longitude$vals==45)LatIdx <-
which(ivt$dim$latitude$vals>20 & ivt$dim$latitude$vals<35)
q1<-ncvar_get(ivt,varid="q",start=c(1,1,1,1),count=c(-1,-1,1,1))q1<-q1[LonIdx,LatIdx]u1<-ncvar_get(ivt,varid="u",start=c(1,1,1,1),count=c(-1,-1,1,1))u1<-u1[LonIdx,LatIdx]v1<-ncvar_get(ivt,varid="v",start=c(1,1,1,1),count=c(-1,-1,1,1))v1<-v1[LonIdx,LatIdx]g<-9.81ivt1<-
sqrt(1/g*(q1*u1*100)^2+(q1*v1*100)^2)
i have 8 level from 1000 to 300for (k in 1:8){ + for (j in [1:31]){ + for (i
in 1:28){
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