R Error In Filefile Rt
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In File File Rt Cannot Open File Permission Denied
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Error In File(file Rt ) Cannot Open The Connection Calls Anonymous
6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Error in file(file, “rt”) : cannot open the connection in r up vote 0 down vote favorite I
Error: Cannot Open The Connection Shiny
am new to programming.Currently doing R programming in coursera and got this error while doing assignment named "pollutantmean".I searched in forums and stackoverflow,but couldnt able to fix it.Appreciate your help.Thanks. I got this error : Error in file(file, "rt") : cannot open the connection In addition: Warning message: In file(file, "rt") : cannot open file 'NA': No such file or directory Note: I have a folder "specdata" which is the working directory.This r cannot open file permission denied "specdata" has all the 332 csv files.I want to calculate mean for one of the pollutant column named "pollutant" in those files and "directory" is the location of those files."id" is a integer vector mentioning the monitor number.so,here is my code: pollutantmean <- function(directory, pollutant, id = 1:332) { files_full <- list.files(directory, full.names = TRUE) dat <- data.frame() for (i in id) { dat <- rbind(dat, read.csv(files_full[i])) } mean(dat[, pollutant], na.rm = TRUE) } pollutantmean("specdata","sulfate",id = 1:10) r share|improve this question edited Sep 6 at 21:49 Nishu Tayal 7,16652469 asked Sep 6 at 21:47 Aruna Ramadoss 1 Hi Aruna, it looks like your list.files has created an empty string. You might want to add pattern = "csv" in your list.files call in case there are additional files in your directory. –biomiha Sep 6 at 21:54 add a comment| 1 Answer 1 active oldest votes up vote 0 down vote As per the error, it seems that list.files is returning empty vector for files names. list.files returns only file nam inside the directory by default. So in that case, you should set the working directory first, so that read.csv will read the files inside the working directory. setwd("
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies error cannot open the connection r shiny of this site About Us Learn more about Stack Overflow the company error during wrapup: cannot open the connection Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges error in file file rt invalid description argument Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes a http://stackoverflow.com/questions/39358338/error-in-filefile-rt-cannot-open-the-connection-in-r minute: Sign up Error in file(file, “rt”) : cannot open the connection - cannot open file 'specdata' access denied up vote 2 down vote favorite I'm running rStudio v3.1.2 on Windows 7. This laptop is a 64-bit machine. I'm taking the JHU R Programming course offered by Coursera and am stuck on an error I'm receiving in part 1 of the problem. http://stackoverflow.com/questions/28597536/error-in-filefile-rt-cannot-open-the-connection-cannot-open-file-specd I have some error handling functions I'm keeping out of this example so I'm really just trying to show what I absolutely need to. The only reason I include the messages is the demonstrate that all the conditions must be satisfied in order to proceed. pollutantmean <- function(directory, pollutant, id=1:332) { setwd("C:\\Users\\WR-eSUB\\specdata") if(!isValidDirectory(directory)) { stop("Invalid input given. Please specify valid directory to operate on.") } if(!isValidPollutant(pollutant)) { stop("Invalid input given. Please specify valid pollutant (nitrate/sulfate).") } if(!isValidIdRange(id)) { stop("Invalid input given. Please specify valid id range (1:332).") } sortedData = numeric() for (i in id) { thisFileName = paste(formatC(i, width = 3, flag = "0"), ".csv", sep="") thisFileRead = read.csv(directory, thisFileName) sortedData = c(sortedData, thisFileRead[[pollutant]]) } mean(sortedData, na.rm = TRUE) } Note that inside WR-eSUB is a folder called specdata and inside that folder there is the directory that contains the .csv files also called specdata. I could change this but so far I've been working with it and I have not stumbled into any problems. When I call pollutantmean("specdata", "nitrate", 1:2) I get the following error message: Error in file(file, "rt") : ca
here for a quick overview of the site Help Center Detailed answers to any questions you might have http://stackoverflow.com/questions/12342790/how-to-import-files-into-r Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just like cannot open you, helping each other. Join them; it only takes a minute: Sign up How to import files into R? up vote 8 down vote favorite 2 I'm a new user to R, sorry if my question is too basic. I've installed the newest version of R on windows 7 and as a practice, i tried to cannot open the open a .txt file using students<-read.table("students.txt",header=T,sep="\t") but there's always an error message as follows: Error in file(file, "rt") : cannot open the connection In addition: Warning message: In file(file, "rt") : cannot open file 'students.txt': No such file or directory I've already changed the directory to where the students.txt resides; but it just doesn't work. Please help! Thank you very much in advance if anyone can help me solve the problem. r share|improve this question asked Sep 8 '10 at 2:08 user1209 migrated from stats.stackexchange.com Sep 9 '12 at 20:42 This question came from our site for people interested in statistics, machine learning, data analysis, data mining, and data visualization. I am running R 2.11.0 on Windows 7 and the function for me for the file chooser is file.choose() So your code would look like: students <- read.table(file.choose(), header=T, sep="\t") –hgcrpd Sep 8 '10 at 8:13 Questions about pure programming aspects of R might better be asked at stackoverflow, there's a larger userbase f