read.csv

I have seen in several cases that while read.table() is not able to read a tab delimited file (for example the annotation table of a microarray) returning the following error: Error in scan(file, what, nmax, sep, dec, quote, skip, nlines, na.strings, : line xxx did not have yyy elements read.csv() works perfectly on the same file with no errors. I think also the speed of read.csv() is also higher than read.table() . Even more: read.table() is doing very crazy reading a file of me. It makes this error while reading line 100, but when I copy and paste lines 90 to 110 just after the head of the

I am using read.table to read a data file. and got the following error: Error in scan(file, what, nmax, sep, dec, quote, skip, nlines, na.strings, : scan() expected 'a real', got 'true' I know that means there's some error in my data file, the problem is how can I find where is it. The error message did not tell which row has the issue, it's hard for me to find it. Or how can I skip these rows? Here's my R code: data<-read.csv("/home/jianfezhang/prod/conversion_yaap/data/part-r-00000", sep="\t", col.names=c("site", "treatment", "mode", "segment", "source", "itemId", "leaf_categ_id", "condition

My data set testdata has 2 variables named PWGTP and AGEP The data are in a .csv file. When I do: > head(testdata) The variables show up as ï..PWGTP AGEP 23 55 26 56 24 45 22 51 25 54 23 35 So, for some reason, R is reading PWGTP as ï..PWGTP . No biggie. HOWEVER, when I use some function to refer to the variable ï..PWGTP , I get the message: Error: id variables not found in data: ï..PWGTP Similarly, when I use some function to refer to the variable PWGTP , I get the message: Error: id variables not found in data: PWGTP 2 Questions: Is there anything I should be doing to the source file to

I am running the following code... #Create a list of all the files file.list <- list.files(path="~/R/natural-language-processing/class-notes", pattern=".csv") #Loop over file list importing them and binding them together D1 <- do.call("rbind",lapply(file.list, read.csv, header = TRUE, stringsAsFactors = FALSE)) This is the error I get when I run do.call line above. Error in file(file, "rt") : cannot open the connection I've tried resetting my wd. My current getwd() is ~/R/natural-language-processing I've looked through the other Error in file(file, “rt”): cannot open connection Most likely you

I have been using the following command for a long time without problem: spy <- read.csv("http://ichart.finance.yahoo.com/table.csv?s=SPY") But in the past few days it started to throw the following error: Warning messages: 1: In file(file, "rt") : "internal" method cannot handle https redirection to: ' https://ichart.finance.yahoo.com/table.csv?s=SPY ' 2: In file(file, "rt") : "internal" method failed, so trying "libcurl" I've updated my RStudio, R and all packages to the most up-to-date versions as of today. Could someone help me resolve this issue? Thanks in advance! The fix is right there

I am using R to do some data pre-processing, and here is the problem that I am faced with: I input the data using read.csv(filename,header=TRUE) , and then the space in variable names became ".", for example, a variable named Full Code became Full.Code in the generated dataframe. After the processing, I use write.xlsx(filename) to export the results, while the variable names are changed. How to address this problem? Besides, in the output .xlsx file, the first column become indices(i.e., 1 to N), which is not what I am expecting. If your set check.names=FALSE in read.csv when you read the data