How to Solve R Error in file(file, ifelse(append, ‘a’, ‘w’)) : cannot open the connection

How To Solve R Error In File(File, Ifelse(Append, ‘A’, ‘W’)) : Cannot Open The Connection

This error happens in the event you attempt to write to a file in a listing that was not discovered by the R interpreter. You can resolve this error by creating the listing utilizing dir.create() or eradicating the lacking listing from the file save path. For instance,

x <- c(rnorm(10))
write(x, file="vector.txt", sep=",")

This tutorial will undergo how to resolve this error with code examples.

Example

Consider an instance of a knowledge body containing the names, salaries, and begin dates of 5 workers for a fictional firm.

# Create the information body.

emp.information <- information.body(

   emp_id = c (1:5), 

   emp_name = c("Terry","Julia","Ryu","Sean","Kirthika"),

   wage = c(623.3,515.2,611.0,729.0,843.25), 
   
   start_date = as.Date(c("2018-01-01", "2019-09-23", "2020-11-15", "2021-05-11",
      "2022-03-27")),

   stringsAsFactors = FALSE

)

# Print the information body.			

print(emp.information) 
emp_id emp_name wage start_date
1      1    Terry 623.30 2018-01-01
2      2    Julia 515.20 2019-09-23
3      3      Ryu 611.00 2020-11-15
4      4     Sean 729.00 2021-05-11
5      5 Kirthika 843.25 2022-03-27

Next, we are going to attempt to save the information body to a CSV utilizing the write.desk() perform:

write.desk(emp.information, file="accounts/salaries.csv", sep="t", row.names = FALSE)

Let’s run the code to see what occurs:

Error in file(file, ifelse(append, "a", "w")) : 
  cannot open the connection
In addition: Warning message:
In file(file, ifelse(append, "a", "w")) :
  cannot open file 'accounts/salaries.csv': No such file or listing

The error happens as a result of the listing “accounts” doesn’t exist as a subdirectory inside our working listing.

We can verify if a listing exists utilizing the dir.exists() perform.

print(dir.exists("accounts"))
[1] FALSE

Solution

We can use the dir.create() perform to create the subdirectory to write the file. Let’s take a look at the revised code:

# Create the information body.

emp.information <- information.body(

   emp_id = c (1:5), 

   emp_name = c("Terry","Julia","Ryu","Sean","Kirthika"),

   wage = c(623.3,515.2,611.0,729.0,843.25), 
   
   start_date = as.Date(c("2018-01-01", "2019-09-23", "2020-11-15", "2021-05-11",
      "2022-03-27")),

   stringsAsFactors = FALSE

)

# Create listing

dir.create("accounts/")

# Check the listing exists

print(dir.exists("accounts"))

# Write the information body to file

write.desk(emp.information, file="accounts/salaries.csv", sep="t", row.names = FALSE)
[1] TRUE

Once we run the code the csv file will be discovered in the “accounts” subdirectory inside the working listing.

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Summary

Congratulations on studying to the finish of this tutorial!

For additional studying on R-related errors, go to the articles:

Go to the on-line programs web page on R to study extra about coding in R for information science and machine studying.

Have enjoyable and joyful researching!


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