On Wed, Mar 09, 2011 at 04:32:29PM -0600, Giovanni Petris wrote: > > Hello, > > I have a file that looks like this: > > Date,Hour,DA_DMD,DMD,DA_RTP,RTP,, > 1/1/2006,1,3393.9,3412,76.65,105.04,, > 1/1/2006,2,3173.3,3202,69.20,67.67,, > 1/1/2006,3,3040.0,3051,69.20,77.67,, > 1/1/2006,4,2998.2,2979,67.32,69.10,, > 1/1/2006,5,3005.8,2958,65.20,68.34,, > > where the ',' is the separator and I tried to read it into R, but... > > > y <- read.csv("Data/Data_tmp.csv", header = FALSE, skip = 1, > + colClasses = c("character", "int", rep("double", 4)), > + col.names = c("Date","Hour","DA_DMD","DMD","DA_RTP", "RTP"), > + flush = TRUE) > Error in read.table(file = file, header = header, sep = sep, quote = quote, > : > more columns than column names > > count.fields() gives me 8 fields per line, so I tried other variations, > like the following, with two fictitious extra fields, but... >... > Error in methods::as(data[[i]], colClasses[i]) : > no method or default for coercing "character" to "int" > > Could anybody please tell me what I am doing wrong and how I could read > my data into R?
I copied the data locally, then I read it using: > y <- read.csv("Data_tmp.csv", header = TRUE, colClasses = c("character", > "integer", rep("double", 4), "NULL", "NULL")) which yields: > y Date Hour DA_DMD DMD DA_RTP RTP 1 1/1/2006 1 3393.9 3412 76.65 105.04 2 1/1/2006 2 3173.3 3202 69.20 67.67 3 1/1/2006 3 3040.0 3051 69.20 77.67 4 1/1/2006 4 2998.2 2979 67.32 69.10 5 1/1/2006 5 3005.8 2958 65.20 68.34 > Is that what you had in mind? Issues I tried to address: * The class is "integer", not "int". * I used "NULL" class to refer to columns that are to be skipped. * I made use of the headers, rather than skipping them & re-coding their content in the read.csv() invocation. Peace, david -- David H. Wolfskill r...@catwhisker.org Depriving a girl or boy of an opportunity for education is evil. See http://www.catwhisker.org/~david/publickey.gpg for my public key.
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