On 10/09/2010 10:03 AM, Marcelo Estácio wrote:
Dear,
When I try to to execute the following command, R don't read all lines (reads
only 57658 lines when the file has 814125 lines):
dados2<-read.table("C:\\Documents and Settings\\mgoncalves\\Desktop\\Tábua
IFPD\\200701_02_03_04\\SegurosClube.txt",header=FALSE,sep="^",colClasses=c("character","character","NULL",NA,"NULL","NULL","NULL","character","character","NULL","NULL","NULL","NULL",NA,"NULL","NULL","NULL","NULL",NA,"NULL","NULL"),quote="",comment.char="",skip=1,fill=TRUE)
If I exclude "fill=TRUE", R gives the message
Warning message:
In scan(file, what, nmax, sep, dec, quote, skip, nlines, na.strings, :
número de itens não é múltiplo do número de colunas (number of itens is not
multiple of number of columns)
I identified that the problem is the following line of my data (line 57659 of
my file):
13850074571^01/01/1940^00000000000^93101104^^^1^01/05/2006^30/06/2006^13479^13479^13479^0^0^0^0^^66214-Previdência
privada fechada^MARIA^DA CONCEI`O FERREIRA LOBATO^CORPORATE
As you can observe, my data have a "square" string like this: (i don't know
if you can see the character, but it looks like a white square). It looks like that R
understands this character as the end of the archive.
I opened my data on the notepad and copied the character. When I paste this
character on R, it try to close asking if I want to save my work. What is
happenning?
That symbol is the way some systems display the hex 1A character, which
in DOS marked the end of file. By the pathname it looks as though
you're working on Windows, which has inherited that behaviour.
The best way to get around it would be to correct those bad characters:
they are almost certainly errors in the data file. If you want to keep
them, then you could try reading the file in binary mode rather than
text mode. You do this using
con <- file( "filename", open="rb")
read.table(con, header=FALSE, ...)
close(con)
You could also try reading it on a different OS; I don't think Linux
cares about 1A characters.
Duncan Murdoch
Thanks very much.
Marcelo Estácio
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