swirl - cannot download readr

General
1

I can't download readr when following swirl instruction. I have downloaded x code app, x code line tool, just everything about xcode but still it doesn't work...

| Trying to install package ‘readr’ now...
Warning in install.packages :
unable to access index for repository https://cran.rstudio.com/bin/macosx/el-capitan/contrib/3.6:
cannot open URL 'https://cran.rstudio.com/bin/macosx/el-capitan/contrib/3.6/PACKAGES'
Package which is only available in source form, and may need compilation of C/C++/Fortran: ‘readr’
Do you want to attempt to install these from sources? (Yes/no/cancel) Yes
installing the source package ‘readr’

Warning in install.packages :
installation of package ‘readr’ had non-zero exit status

| Could not install package ‘readr’!
| | 0%Error in seq.default(0, 1, length.out = nrow(e$les)) :
argument 'length.out' must be of length 1

2

If you don't need the latest versions, answer "no" to this question and you would get the binary version which is a little older but easier to install.

3

thanks for your reply. I did, but still not working. I even updated my os to refresh the xcode.

Do you want to attempt to install these from sources? (Yes/no/cancel) no

| Could not install package ‘readr’!
| | 0%Error in seq.default(0, 1, length.out = nrow(e$les)) :
argument 'length.out' must be of length 1

| Leaving swirl now. Type swirl() to resume.

4

There seems to be an issue with CRAN repositories for macOS not all of them have binary installers for macOS so try changing your CRAN repository, I'm sorry I can't tell you exactly which one since I'm not a macOS user.

1 Like
5

today I tried to install again and suddenly it worked!!! Below are the codes I tried:

installed.packages("readr")
Package LibPath Version Priority Depends Imports LinkingTo Suggests Enhances License License_is_FOSS License_restricts_use
OS_type Archs MD5sum NeedsCompilation Built
library(readr)
Error in library(readr) : there is no package called ‘readr’
install.packages("readr")
trying URL 'https://cran.rstudio.com/bin/macosx/el-capitan/contrib/3.6/readr_1.3.1.tgz'
Content type 'application/x-gzip' length 792657 bytes (774 KB)
==================================================
downloaded 774 KB

The downloaded binary packages are in
/var/folders/6q/jpk5dpt14_q1knkrtm5tysnr0000gn/T//Rtmp302MXN/downloaded_packages

library(readr)

library("readr")

6

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