I'm very new to R and just finding my way, so be gentle!
I've hit a swift halt doing some summary statistics on a simple continuous data field, divided into two categories. I'm getting the following error message. I am unclear why length(names(tth$Mins.to.hospital)) is zero and how to alter this. This is preventing me from carrying the summary data forward to any further analyses, which I need to create some new variables to account for the missing data points. I'm sure this is a very simple error, and I apologise for asking! Lynn The output is below - I have the epicalc program loaded. > aggregate(tth$Mins.to.hospital, by=list(DIRECT=tth$JR.1st.hospital)) Note: Missing values removed. DIRECT count.. sum.. mean.. median.. sd.. min.. max.$ 1 No 76 202607 2665.8816 630 5297.410 217 26495 2 Yes 319 57859 181.3762 70 1314.982 0 23180 Warning messages: 1: In names(y)[length(names(y))] <- paste("count", as.character(substitute(x)), : number of items to replace is not a multiple of replacement length 2: In names(y)[length(names(y))] <- paste(FUN[i], as.character(substitute(x)), : number of items to replace is not a multiple of replacement length 3: In names(y)[length(names(y))] <- paste(FUN[i], as.character(substitute(x)), : number of items to replace is not a multiple of replacement length 4: In names(y)[length(names(y))] <- paste(FUN[i], as.character(substitute(x)), : number of items to replace is not a multiple of replacement length 5: In names(y)[length(names(y))] <- paste(FUN[i], as.character(substitute(x)), : number of items to replace is not a multiple of replacement length 6: In names(y)[length(names(y))] <- paste(FUN[i], as.character(substitute(x)), : number of items to replace is not a multiple of replacement length 7: In names(y)[length(names(y))] <- paste(FUN[i], as.character(substitute(x)), : number of items to replace is not a multiple of replacement length > colnames(tth) [1] "Time.to.hospital.arrival.present.only" "Mins.to.hospital" "JR.1st.hospital" > length(names(tth$Mins.to.hospital)) [1] 0 > length(paste("Count", as.character(substitute(tth$JR.1st.hospital)))) [1] 3 [[alternative HTML version deleted]] ______________________________________________ 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.