You need to install package “dplyr” first:

> install.packages("dplyr")
also installing the dependencies ‘assertthat’, ‘R6’, ‘Rcpp’, ‘magrittr’, ‘lazyeval’, ‘BH’

trying URL 'https://cran.rstudio.com/bin/windows/contrib/3.2/assertthat_0.1.zip'
Content type 'application/zip' length 44881 bytes (43 KB)
downloaded 43 KB

trying URL 'https://cran.rstudio.com/bin/windows/contrib/3.2/R6_2.1.1.zip'
Content type 'application/zip' length 144413 bytes (141 KB)
downloaded 141 KB

trying URL 'https://cran.rstudio.com/bin/windows/contrib/3.2/Rcpp_0.12.2.zip'
Content type 'application/zip' length 3195234 bytes (3.0 MB)
downloaded 3.0 MB

trying URL 'https://cran.rstudio.com/bin/windows/contrib/3.2/magrittr_1.5.zip'
Content type 'application/zip' length 149897 bytes (146 KB)
downloaded 146 KB

trying URL 'https://cran.rstudio.com/bin/windows/contrib/3.2/lazyeval_0.1.10.zip'
Content type 'application/zip' length 63077 bytes (61 KB)
downloaded 61 KB

trying URL 'https://cran.rstudio.com/bin/windows/contrib/3.2/BH_1.58.0-1.zip'
Content type 'application/zip' length 13846694 bytes (13.2 MB)
downloaded 13.2 MB

trying URL 'https://cran.rstudio.com/bin/windows/contrib/3.2/dplyr_0.4.3.zip'
Content type 'application/zip' length 2552454 bytes (2.4 MB)
downloaded 2.4 MB

package ‘assertthat’ successfully unpacked and MD5 sums checked
package ‘R6’ successfully unpacked and MD5 sums checked
package ‘Rcpp’ successfully unpacked and MD5 sums checked
package ‘magrittr’ successfully unpacked and MD5 sums checked
package ‘lazyeval’ successfully unpacked and MD5 sums checked
package ‘BH’ successfully unpacked and MD5 sums checked
package ‘dplyr’ successfully unpacked and MD5 sums checked

The downloaded binary packages are in
	C:\Users\TestUser\AppData\Local\Temp\RtmpeKMwb6\downloaded_packages
> library("dplyr")

Attaching package: ‘dplyr’

The following objects are masked from ‘package:stats’:

    filter, lag

The following objects are masked from ‘package:base’:

    intersect, setdiff, setequal, union