CODEWITHSUNDEEP
rraster
rar
rar

Reputation: 924

Selecting raster stack layers from defined intervals

I have a raster stack s with 744 layers. Of these, 744, I need to make new stack S1 with layers 18 to 24 (i.e. 6 layers from 18) and then next 6 layers at a gap of 24 from 18 (i.e. 42 to 48). So I need to keep picking 6 layers at gap of 24 till I reach the end of the stack. So what I have done is follows:

x<-data.frame(seq(18, 744, by = 24))
x$v2<-seq(24, 744, by = 24)
S1<-stack(s[[x[1,1]:x[1,2]]])
for(i in 2:nrow(x)){
  S1<-stack(S1,s[[x[i,1]:x[i,2]]])
}

However, I would like to know a if there is a cleaner and better way to do this.

Upvotes: 0

Views: 203

Answers (1)

Robert Hijmans
Robert Hijmans

Reputation: 47536

You can do

i <- rep(18:24, 31) + rep(0:30, each=7) * 24
S2 <- S1[[i]]

Upvotes: 2

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