| #if you want a series of column names, e.g., col1,col2,col3, ..., #you can use: mydf<-data.frame(matrix(ncol=5,nrow=4)) colnames(mydf)<-c("col1","col2","col3","col4","col5") #Well, it does work, but how about for 50 columns? #A loop! Sounds great. Okay, mydf<-data.frame(matrix(ncol=50,nrow=4)) for (n in 1:ncol(mydf)) { colnames(mydf)[n]<-paste("col",n,sep="") } #But again, it's as urgly as the textbook. Here we offer a much better solution: colnames(mydf)<-paste(rep("col",ncol(mydf)),c(1:ncol(mydf)),sep="") #Smart, eh? At least the nicer looking :) #From http://scriptdemo.blogspot.com |
Friday, December 17, 2010
Generate a series of column names in R
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4 comments:
Very helpful, non-ugly, method. Thanks.
I need to name the first columm whith another name like (Time, host1, host2, host3). Can u help me?
Bit late @allan but this has worked for me:
colnames(df)<-c("a","b","c","d", paste(rep("tag",(ncol(df)-4)),c(1:(ncol(df)-4)),sep=""))
Where 4 refers to the number of columns whose name you manually specify
Louis' solution worked for me
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