rownames(Data)=as.character(Data[,1])
I am using this code:and Data[,1] has following output
head(Data[,1])
[1] "chrUn_random-1" "chrUn_random-2" "chrUn_random-3" "chrUn_random-7"
[5] "chrUn_random-9" "chrUn_random-11"
I want to assign these as row names. but every time it gives me an error.
Error in `row.names
The error messages really tell you what the problem is (that's not always the case - but here it is really clear):
duplicate 'row.names' are not allowed
the vector you like to assign to the row names contains some duplicate values. From the rest of the output I can alread see that at least ‘6.66666666666667’ occurs twice.
It seems that the vector you want to be the row names is a numeric vector. This wouldn't make much sense. Maybe you are mixing up something there. Particularily, in your post I don't see that you really use Data[,1] as rownames. The error messagen seems to be raised in some function, and maybe this is the place where things get mixed up.
Your call
row.names(Data)=ifile[,4]
makes sense only if the length of the vector ifile[,4] is the same as the number of rows in Data. This is obviousely not the case, as the error message tells you clearly. So check why ifile has a different number of rows as Data. Make sure that the vector you want to assign to the row names has exactly as many elements as the data.frame has rows, and that all elements in the vector are unique.
You can check for duplicates with
dups 0 when there are duplicates
unique(x[dups]) # prints the elements in x that are occuring more than once
The first error you referenced appears to have been generated because you have duplicates in Data[,1]. Each row name in a data frame needs to be unique. If you're not sure whether or not you have duplicates, try running this code:
length(unique(Data[,1]))==length(Data[,1])
Output of "[1] FALSE" indicates that you have at least one duplicate.
The second error is occurring because the vector you're trying to use for row names has a length different from your number of rows.
If you want to have rownames containing the data in Data[,1], you could do something like:
rownames(Data)=paste(c(1:nrow(Data)),Data[,1]) which will yield row names:
"1 chUn_random-1" "2 chrUn_random-2" "3 chrUn_random-3" "4 chrUn_random-7"
[5] "5 chrUn_random-9" "6 chrUn_random-11".
The leading numerals in the resulting rownames will ensure that each is unique.
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