There are other issues here addressing the same question, but I don't realize how to solve my problem based on it. So, I have 5 data frames that I want to merge rows in one unique data frame using rbind, but it returns the error:
"Error in row.names<-.data.frame(*tmp*, value = value) :
'row.names' duplicated not allowed
In addition: Warning message:
non-unique values when setting 'row.names': ‘1’, ‘10’, ‘100’, ‘1000’, ‘10000’, ‘100000’, ‘1000000’, ‘1000001 [....]"
The data frames have the same columns but different number of rows. I thought the rbind command took the first column as row.names. So tried to put a sequential id in the five data frames but it doesn't work. I've tried to specify a sequential row names among the data frames via row.names() but with no success too. The merge command is not an option I think because are 5 data frames and successive merges will overwrite precedents. I've created a new data frame only with ids and tried to join but the resulting data frame don't append the columns of joined df.
Follows an extract of df 1:
id image power value pol class
1 1 tsx_sm_hh 0.1834515 -7.364787 hh FR
2 2 tsx_sm_hh 0.1834515 -7.364787 hh FR
3 3 tsx_sm_hh 0.1991938 -7.007242 hh FR
4 4 tsx_sm_hh 0.1991938 -7.007242 hh FR
5 5 tsx_sm_hh 0.2079365 -6.820693 hh FR
6 6 tsx_sm_hh 0.2079365 -6.820693 hh FR
[...]
1802124 1802124 tsx_sm_hh 0.1991938 -7.007242 hh FR
The four other df's are the same structure, except the 'id' columns that don't have duplicated numbers among it. 'pol' and 'image' columns are defined as levels.
and all.pol <- rbind(df1,df2,df3,df4,df5) return the this error of row.names duplicated.
Any idea?
Thanks in advance
I had the same error recently. What turned out to be the problem in my case was one of the attributes of the data frame was a list. After casting it to basic object (e.g. numeric) rbind worked just fine.
By the way row name is the "row numbers" to the left of the first variable. In your example, it is 1, 2, 3, ... (the same as your id variable).
You can see it using rownames(df) and set it using rownames(df) <- name_vector (name_vector must have the same length as df and its elements must be unique).
I had the same error.
My problem was that one of the columns in the dataframes was itself a dataframe. and I couldn't easily find the offending column
data.table::rbindlist() helped to locate it
library(data.table)
rbindlist(a)
# Error in rbindlist(a) :
# Column 25 of item 1 is length 2 inconsistent with column 1 which is length 16. Only length-1 columns are recycled.
a[[1]][, 25] %>% class # "data.frame" K- this should obviously be converted to a column or removed
After removing the errant columndo.call(rbind, a) worked as expected
来源：https://stackoverflow.com/questions/22766738/r-rbind-error-row-names-duplicates-not-allowed