I have a xlsx file and to read from Rstudio i saved it as .csv file. Now when i try to read the file from Rstudio, receiving the below error.
setwd("D:/DATA SCIENCE/CCPP-Linear regression")
ccpp<- read.csv("Folds5x2_pp.csv", header = TRUE)
Error in file(file, "rt") : cannot open the connection In addition:
Warning message: In file(file, "rt") : cannot open file
'Folds5x2_pp.csv': No such file or directory
As already mentioned in the comments, the "cannot open the connection" part of the error message confirms that where R is looking is not where the file is.
A few things to keep in mind
use getwd() to see the current R working directory
use setwd() to change R's wd
You should use RStudio projects to organize your projects - this helps with the working directory thing
spaces in paths are difficult sometimes. Looks like you have "D:/DATA SCIENCE", that space can cause problems (you may need to escape the space like "DATA\ SCIENCE".
You can read the file using the full path (e.g. read.csv("D:/DATA SCIENCE/path/file.csv")) or if you are doing this a lot, set a variable to your path data_path ="D:/DATA SCIENCE/path/" and then read.csv(file.path(data_path, "file.csv")) where file.path concatenates with your OS specific path delimiter.
You can import files into RStudio using the Import Dataset option under Tools in the menu bar.
Related
I am learning R but I am stuck in loading my own dataset into R. So far, the code that I have is the following. The dataset (.csv) is located in my desktop.
Data500 <- read.csv("sp500.csv", header = TRUE)
I get this error message in the console.
Error in file(file, "rt") : cannot open the connection
In addition: Warning message:
In file(file, "rt") :
cannot open file 'sp500.csv': No such file or directory
This is because the file isn't located in your working directory, which is where R is searching.
use getwd() to see what working directory you are in currently (for this R session).
You can either
a) move your csv file to that working directory (if it happens to be a good place to keep it),
b) specify the full path (e.g., read.csv("C:/Users/DChavez/Documents/Project_Name/sp500.csv"))
OR
c) you can change the working directory to be where your file is before running read.csv().
Two ways to do this:
Use setwd() at the top of your code to set the working directory. In Windows, it might look something like this: setwd("C:/Users/DChavez/Documents/Project_Name/")
IF you are using RStudio, you can navigate to the "Session" bar at the top, then "Set Working Directory" then "Choose Directory...", where you will navigate to the folder that houses your csv file.
I'm having issues reading the data on the desktop version of Rstudio on mac. When I do the usual read.csv it shows the error shown in the title. This is the first time this has happened. I have tried to change my working directory in 'Sessions' at the top and also to read the file with its granularity
You could try rstudioapi library to set an unique wd for your script path and then use read.csv() where path= "test.csv"
library(rstudioapi)
setwd(dirname(rstudioapi::getActiveDocumentContext()$path))
Test <- read.csv("test.csv")
I receive weekly emails from a database as zip files. In the zip file is a single xls file. When I use unzip() and place the xls file into a designated shared network directory, I cannot use any xls read functions to actually access and manipulate the data (I haven't tried read.xls because of the Perl dependencies, but I'm willing to if there are no other options).
I've tried every Excel reader I can find.
read_xls(unzip(zipfile = zfile, files = "Data Extract.xls", exdir = "~\\Excel Files"))
Errors include the following where I would simply expect a dataframe output:
"libxls error: Unable to open file"
"Error in open.connection(file, "rt") : cannot open the connection
In addition: Warning message:
In open.connection(file, "rt") :
cannot open zip file 'Data.zip:F'
EDIT: It turns out that despite the DB interface calling this file within the zip an .xls file, it's an HTML file and readHTMLTable() from library(XML) did the trick just fine. Thank you for the questions which lead me to looking at ths issue from a different angle.
I just downloaded R onto my computer, but when I try to read a .csv file I get the following error:
Error in file(file, "rt") : cannot open the connection
In addition: Warning message:
In file(file, "rt") :
cannot open file '[filename].csv': No such file or directory
This happens both when I command the program to read the .csv or when I try to import it manually (although that error code is slightly different).
Could this be because I don't have Microsoft Office (and subsequently, Excel) on my computer? The .csv file exists and is not corrupt because I have no problem uploading the file to Google sheets and displaying the data there. Either that, or I didn't install R correctly. Any suggestions?
No, you don't need any special packages to read plain text CSV files in R.
Looking at your error message:
Warning message: In file(file, "rt") : cannot open file '[filename].csv': No such file or directory
I would guess that the problem is your path to the file in question. As a quick fix, you can try using the fully qualified path to your file. For example, on Windows you might try this:
data <- read.csv(file="c:/path/to/filename.csv", header=TRUE, sep=",")
If this works, then the issue was the location of your CSV file. Then, if you want to continue using a relative path, you'll have to figure out what that would be given your current R setup.
I just started learning R which is my first programming language. I tried importing a CSV file from my system which is on my downloads in my computer using:
getwd()
setwd("/downloads")
statesInfo <- read.csv('stateData.csv')
But i keep getting the error message below.
setwd("/downloads")
Error in setwd("/downloads") : cannot change working directory
statesInfo <- read.csv('stateData.csv')
Error in file(file, "rt") : cannot open the connection
In addition: Warning message:
In file(file, "rt") :
cannot open file 'stateData.csv': No such file or directory.
Could I be getting it wrong.
R is unable to recognize the directory that you're referring to and that's why you get the first error.
The working directory remains unchanged and R can not find the file stateData.csv in the current working directory which results in the second error message.
For setting a working directory use the full path instead: setwd("C:/Users/yourname/Downloads/") - notice the forward slash instead of the back-slash.
However, If you're only importing files, you do not need to change your working directory every time. You can simply refer to files in other locations. If you're using windows - you will need to use ./ for sub-folders and ../ for folders that are one level up. For example. if your working directory is set to 'C:/Users/yourname/Desktop/R' and you want to read a file from the 'Downloads' folder, simply use the below code:
dat <- read.csv("../../Downloads/stateData.csv")
the first ../ takes you one level up to the 'Desktop' and the second ../ takes you to 'Users'. From there you are referring to 'Downloads' folder where the stateData.csv file is located.
EDIT
The above works for Windows isntallations, for Mac/others you would have to use the tilda notation: e.g. ~/Desktop
So, it should be like this.
setwd("c:/mydir")
Also.
MyData <- read.csv(file="c:/mydir/TheDataIWantToReadIn.csv", header=TRUE, sep=",")