On 2012-07-07 03:19, fabiano wrote:
I have been working on the following code but keep getting an err message. My current thinking is that the problem is on the indexing but do not know how to fix it. Any help please?ungulate <- read.csv("Ungulate.csv",row.names=1) ungulate <- as.matrix(ungulate);colnames(ungulate)<-NULL;rownames(ungulate)<-NULL habitat <- read.csv("Ungulate_vegetation.csv") habitat <- habitat[,3] site.data <- read.csv("Ungulate_site.csv") site <- site.data$SiteId visit <- site.data$Visit date <- site.data$Date date <- matrix(date,nrow=20,ncol=7,byrow=TRUE) S <- dim(ungulate)[1] m <- 14 # number of augmented species G <- read.csv("Ungulate_group.csv") G <- G[,2] g <- rep(NA,length=m) G <- c(G,g) # combined list with actual and augmented data set so in this case 6 + 14 g <- length(table(G)) # habitat id Hab <- cbind(seq(1,20),habitat) #habitat types for 20 sties run from 2 to 4 hab <- matrix(NA,nrow=2,ncol=7) #creating placing values to be filled with values generated by the following loop for(i in 1:4){ hab[i,] <- Hab[habitat==i,1] } # want to use this loop to substitute NA by exact values as those found in the real data set which can be 2 to 4 but keep getting an error message saying Error in hab[i, ] <- Hab[habitat == i, 1] : replacement has length zero
Have you taken a look at just what 'Hab' and 'habitat' contain? It looks to me that 'habitat' is not a set of integers which it would have to be to get habitat==i to be TRUE. I guess that Hab[habitat==i, 1] is the empty set (hence 'length zero'). Peter Ehlers
Any help. Thanks Error in hab[i, ] <- Hab[habitat == i, 1] : replacement has length zero -- View this message in context: http://r.789695.n4.nabble.com/replacement-has-length-zero-tp4635700.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
