In read.table(): incomplete final line found by readTableHeader

Question

I have a CSV when I try to read.csv() that file, I get the warning warning message:

In read.table(file = file, header = header, sep = sep, quote         


        

Answer 1

Or you can simply open that excel file and save it as .csv file and voila that warning is gone.

Answer 2

Having a "proper" CSV file depends on the software that was used to generate it in the first place.

Consider Google Sheets. The warning will be issued every time that the CSV file -- downloaded via utils::download.file -- contains less than five lines. This likely is related to the fact that (utils:read.table):

The number of data columns is determined by looking at the first five lines of input (or the whole input if it has less than five lines), or from the length of col.names if it is specified and is longer.

In my short experience, if the data in the CSV file is rectangular, then the warning can be ignored.

Now consider LibreOffice Calc. There won't be any warnings, irrespective of the number of lines in the CSV file.

Answer 3

As explained by Hendrik Pon,The message indicates that the last line of the file doesn't end with an End Of Line (EOL) character (linefeed (\n) or carriage return+linefeed (\r\n)).

The remedy is simple:

• Open the file
• Navigate to the very last line of the file
• Place the cursor the end of that line
• Press return/enter
• Save the file

so here is your file without warning

df=read.table("C:\\Users\\Administrator\\Desktop\\tp.csv",header=F,sep=";")
 df
    V1               V2               V3               V4               V5               V6               V7               V8               V9              V10
1 Date 20/12/2013 09:04 20/12/2013 09:08 20/12/2013 09:12 20/12/2013 09:16 20/12/2013 09:20 20/12/2013 09:24 20/12/2013 09:28 20/12/2013 09:32 20/12/2013 09:36
2    1           1,3631           1,3632           1,3634           1,3633            1,363           1,3632           1,3632           1,3632           1,3629
3    2          0,83407          0,83408          0,83415          0,83416          0,83404          0,83386          0,83407          0,83438          0,83472
4    3           142,35           142,38           142,41            142,4           142,41           142,42           142,39           142,42            142,4
5    4           1,2263          1,22635          1,22628          1,22618          1,22614          1,22609          1,22624          1,22643           1,2265

But i think you should not read in this way because you have to again reshape the dataframe,thanks.

Answer 4

I faced the same problem while creating a data matrix in notepad. So i came to the last row of data matrix and pressed enter. Now i have a "n" line data matrix and a new blank line with cursor at the starting of "n+1" line. Problem solved.

Answer 5

I had the same problem with .xls files. My solution is to save the file as a tab delimited .txt. Then you can also manually change the .txt extension to .xls, then you can open the dataframe with read.delim.

This is very rude way to overcome the issue anyway.

Answer 6

This is not a CSV file, each line is a column, you can parse it manually, e.g.:

file <- '~/Downloads/PING CONCOURS DONNES.csv'
lines <- readLines(file)
columns <- strsplit(lines, ';')
headers <- sapply(columns, '[[', 1)
data <- lapply(columns, '[', -1)
df <- do.call(cbind, data)
colnames(df) <- headers
print(head(df))

Note that you can ignore the warning, due that the last end-of-line is missing.