Re: [R] Column naming issues using read.table
I'm not exactly an expert so this is not likely a good way to do it but if the actual variable names are constant across the files why not just read in the data and assign the names later? see skip in ?read.table. x - read.table(d:/junk1.txt, skip=2) should read in the data. You can clean up the file(s) for length, etc once you have read it/them in. Using your sample data I drop column one and only keep 2 of the three lines of data. xx - xx[1:2, -1] names(xx) -c(A, B,C,D,E, F) --- On Wed, 12/23/09, arthurbeer01 arthur_b...@hotmail.com wrote: From: arthurbeer01 arthur_b...@hotmail.com Subject: [R] Column naming issues using read.table To: r-help@r-project.org Received: Wednesday, December 23, 2009, 8:31 PM Hi, this is my first post so please be gentle. I quite new to R and using it for my biology degree. My problem is. Im trying to import data from a .csv file using the read.table command. The .csv file header starts on row 2 but is contained in column 1, i have 600 data files and for future ease would rather not edit each file seperatly. The data starts on row three and I only need the first 381 data points. The R error message using the code iv got so far is Error in read.table(file(s1-2c83.csv), header = FALSE, sep = ,, quote = , : more columns than column names The code I have so far is framename-read.table(file (s1-2c83.csv), header = FALSE, # FLASE indicates headers are not included in input file sep = ,, # must have , otherwise errors in table quote = , dec = ., row.names = 1, # must = 1 or extra column of row numbering is entered col.names = (Nr2sec,Cnt1X,Cnt1Y,Cnt2X,Cnt2Y,sec100,hour), as.is = FALSE, na.strings = NA, colClasses = NULL, nrows = 381, # rows to stop data.table recording (not input file row number!) skip = 2, # number of rows to skp before reading data from input file strip.white = FALSE, comment.char = ) write.csv(framename, file = s1-2c83-ok.csv) If I delete the line col.names, Iv manged to get the data read and saved to a new .csv file but cannot work out how to get the column headers renamed. The read.table (framename) displays the headers as v1,v2,v3 etc, this is what i cant change. Also it has the first column without a header (i think its the row number) which I dont want in the output file The read data file example s1-2c83.csv 1:Samplerate = 2 samps/sec 2: Nr Cnt1X Cnt1Y Cnt2X Cnt2Y sec100 hour 3: 1 53 84 43 2 22 12 4: 2 90 155 74 0 72 12 5: 3 90 155 74 0 121 12 Any help will be greatly appreciated after the 5hrs Iv spent already on this problem. Many thanks in advance Adam -- View this message in context: http://n4.nabble.com/Column-naming-issues-using-read-table-tp978241p978241.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. __ Looking for the perfect gift? Give the gift of Flickr! http://www.flickr.com/gift/ __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] Column naming issues using read.table
Hi, this is my first post so please be gentle. I quite new to R and using it for my biology degree. My problem is. Im trying to import data from a .csv file using the read.table command. The .csv file header starts on row 2 but is contained in column 1, i have 600 data files and for future ease would rather not edit each file seperatly. The data starts on row three and I only need the first 381 data points. The R error message using the code iv got so far is Error in read.table(file(s1-2c83.csv), header = FALSE, sep = ,, quote = , : more columns than column names The code I have so far is framename-read.table(file (s1-2c83.csv), header = FALSE, # FLASE indicates headers are not included in input file sep = ,,# must have , otherwise errors in table quote = , dec = ., row.names = 1, # must = 1 or extra column of row numbering is entered col.names = (Nr2sec,Cnt1X,Cnt1Y,Cnt2X,Cnt2Y,sec100,hour), as.is = FALSE, na.strings = NA, colClasses = NULL, nrows = 381, # rows to stop data.table recording (not input file row number!) skip = 2,# number of rows to skp before reading data from input file strip.white = FALSE, comment.char = ) write.csv(framename, file = s1-2c83-ok.csv) If I delete the line col.names, Iv manged to get the data read and saved to a new .csv file but cannot work out how to get the column headers renamed. The read.table (framename) displays the headers as v1,v2,v3 etc, this is what i cant change. Also it has the first column without a header (i think its the row number) which I dont want in the output file The read data file example s1-2c83.csv 1:Samplerate = 2 samps/sec 2: Nr Cnt1X Cnt1Y Cnt2X Cnt2Y sec100 hour 3: 153 84 43 2 22 12 4: 290 155 74 0 72 12 5: 390 155 74 0 121 12 Any help will be greatly appreciated after the 5hrs Iv spent already on this problem. Many thanks in advance Adam -- View this message in context: http://n4.nabble.com/Column-naming-issues-using-read-table-tp978241p978241.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Column naming issues using read.table
This reads in your posted data: x - read.table(textConnection(Samplerate = 2 samps/sec + Nr Cnt1X Cnt1Y Cnt2X Cnt2Y sec100 hour + 153 84 43 2 22 12 + 290 155 74 0 72 12 + 390 155 74 0 121 12), skip=1, header=TRUE) closeAllConnections() x Nr Cnt1X Cnt1Y Cnt2X Cnt2Y sec100 hour 1 1538443 2 22 12 2 290 15574 0 72 12 3 390 15574 0121 12 On Wed, Dec 23, 2009 at 8:31 PM, arthurbeer01 arthur_b...@hotmail.comwrote: Hi, this is my first post so please be gentle. I quite new to R and using it for my biology degree. My problem is. Im trying to import data from a .csv file using the read.table command. The .csv file header starts on row 2 but is contained in column 1, i have 600 data files and for future ease would rather not edit each file seperatly. The data starts on row three and I only need the first 381 data points. The R error message using the code iv got so far is Error in read.table(file(s1-2c83.csv), header = FALSE, sep = ,, quote = , : more columns than column names The code I have so far is framename-read.table(file (s1-2c83.csv), header = FALSE, # FLASE indicates headers are not included in input file sep = ,,# must have , otherwise errors in table quote = , dec = ., row.names = 1, # must = 1 or extra column of row numbering is entered col.names = (Nr2sec,Cnt1X,Cnt1Y,Cnt2X,Cnt2Y,sec100,hour), as.is = FALSE, na.strings = NA, colClasses = NULL, nrows = 381, # rows to stop data.table recording (not input file row number!) skip = 2,# number of rows to skp before reading data from input file strip.white = FALSE, comment.char = ) write.csv(framename, file = s1-2c83-ok.csv) If I delete the line col.names, Iv manged to get the data read and saved to a new .csv file but cannot work out how to get the column headers renamed. The read.table (framename) displays the headers as v1,v2,v3 etc, this is what i cant change. Also it has the first column without a header (i think its the row number) which I dont want in the output file The read data file example s1-2c83.csv 1:Samplerate = 2 samps/sec 2: Nr Cnt1X Cnt1Y Cnt2X Cnt2Y sec100 hour 3: 153 84 43 2 22 12 4: 290 155 74 0 72 12 5: 390 155 74 0 121 12 Any help will be greatly appreciated after the 5hrs Iv spent already on this problem. Many thanks in advance Adam -- View this message in context: http://n4.nabble.com/Column-naming-issues-using-read-table-tp978241p978241.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.htmlhttp://www.r-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. -- Jim Holtman Cincinnati, OH +1 513 646 9390 What is the problem that you are trying to solve? [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
