sqldf doesn't install on Ubuntu 14.04 - r

Question

I'm trying to install sqldf package in an Ubuntu 14.04 machine, but I'm getting the following error:
Warning in install.packages :
package ‘sqldf’ is not available (for R version 3.0.2)
I tried to install the library libpq-dev as suggested from other post, but I still receive the message.
UPDATE
I'm trying to update R, but I'm getting the following message:
The following packages have unmet dependencies:
r-base : Depends: r-base-core (>= 3.1.2-1precise0) but it is not going to be installed
Depends: r-recommended (= 3.1.2-1precise0) but it is not going to be installed
Recommends: r-base-html but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
I tried the solutions in this topic, but none worked

Answer 1

Look at the package page:
Depends: R (≥ 3.1.0), gsubfn (≥ 0.6), proto, RSQLite (≥ 1.0.0)
As the error message clearly states, you are using an older R 3.0.2 which is less than the required 3.1.0.
The fix is easy: read the Ubuntu-specific README, make the adjustment to install (current !!) R binaries as .deb package via apt-get from CRAN -- and you will have R 3.1.2 in no time.
Which will permit you to install the current sqldf as well.

Answer 2

I followed these instructions and everything worked!
sudo add-apt-repository ppa:marutter/rrutter
sudo apt-get update
sudo apt-get install r-base r-base-dev

Answer 3

You can find this resolved with this try this out:
# Install function for packages
packages<-function(x) {
x<-as.character(match.call()[[2]])
if (!require(x,character.only=TRUE)) {
install.packages(pkgs=x,repos="http://cran.r-project.org")
require(x,character.only=TRUE)
}
}
packages(ggplot2)
packages(reshape2)
packages(plyr)
# etc ...other packages
that's all enjoy..!!