I encountered error when I try to instal a github library to R as follows:
install.packages("devtools")
library(devtools)
install_github("swager/balanceHD")
However, the following error message is displayed:
Downloading github repo swager/balanceHD@master
Error: 'new_handle' is not an exported object from 'namespace:curl'
Any idea on why this happens?
PS: Here's the output of devtools::session_info():
Session info ---------------------------------------------------------------
setting value
version R version 3.0.2 (2013-09-25)
system x86_64, darwin10.8.0
ui RStudio (0.98.953)
language (EN)
collate en_US.UTF-8
tz
Packages -------------------------------------------------------------------
package * version date source
curl * 0.5 2015-02-01 CRAN (R 3.0.2)
data.table 1.9.2 2014-02-27 CRAN (R 3.0.2)
devtools 1.7.0 2015-01-17 CRAN (R 3.0.2)
httr * 1.0.0.9000 2015-06-29 Github (hadley/httr@d9395f2)
MASS 7.3-37 2015-01-10 CRAN (R 3.0.2)
plyr 1.8.1 2014-02-26 CRAN (R 3.0.2)
R6 * 1.0.1 2014-07-17 CRAN (R 3.0.2)
Rcpp * 0.11.5 2015-03-06 CRAN (R 3.0.2)
reshape2 * 1.4.1 2014-12-06 CRAN (R 3.0.2)
rstudio * 0.98.953 2014-07-09 local
rstudioapi * 0.2 2014-12-31 CRAN (R 3.0.2)
stringr * 0.6.2 2012-12-06 CRAN (R 3.0.0)
First of all, I think you should update R. 3.0.2 is considered ancient. No doubt it was a great piece of software back then and in a way still is, but 3 years is a ton of time given the pace at which the language and its entire environment has been evolving.
If everything is up-to-date, communication between R and other programs such as curl is much easier. Plus bugs are easier to track down, because most of the people here cannot reproduce your problem easily. Most people have much newer installations of R and also the entire ecosystem is much newer.