Facing Error in library(caret) : there is no package called ‘caret’ - r

Question

I am facing problem while downloading 'caret' package in R studios. The code below was taken from the caret documentation.
install.packages("caret", dependencies = c("Depends", "Suggests"))
it works fine while installing but it gives Errors and Warnings while unpacking few packages like mentioned below:
ERROR: dependencies ‘eiPack’, ‘ei’, ‘MCMCpack’, ‘Zelig’ are not available for package ‘ZeligEI’
* removing ‘/home/shazil/R/x86_64-pc-linux-gnu-library/3.4/ZeligEI’
Warning in install.packages :
installation of package ‘ZeligEI’ had non-zero exit status
At the end when the whole installation process is finished it says:
The downloaded source packages are in
‘/tmp/RtmpeiP5GO/downloaded_packages’
After that when I use the library() command, the following Error appears
> library(caret)
Error in library(caret) : there is no package called ‘caret’
I am using Ubuntu 16.04,
Dell machine Core i5 7th Gen,
6GB RAM
AMD RADEON GRAPHICS
Would really appreciate the help as I am new to Data Science and R programming.

Answer 1

You need to have both written:
install.packages("caret")
library(caret)

Answer 2

I encountered similar issue when installing caret in MacOS.
The solution was to install devtools and use it to install caret package. Since you are using Ubuntu 16.04,
1.Please refer to this article article to install devtools package.
2.Check the CRAN - caret package for the package URL, then run the code below:
library(devtools)
devtools::install_url("https://cran.r-project.org/src/contrib/caret_6.0-78.tar.gz")
3.If step 2 does not work, alternatively, you can try to install the development version from caret GitHub repo:
library(devtools)
devtools::install_github('topepo/caret/pkg/caret')
Hope these help. Please indicate your R version if these could not work for you.