# Install H2O package in R¶

Currently there are three different ways to install the H2O package in R and depending on the build or version of H2O the user wants to install one method will be more applicable than the others. The instructions below will walk the user through download from CRAN, download from 0xdata website, and install from the most recent source code; all of which makes the assumption that the R session is running R 2.13.0 or later.

• 0xdata website has the most recent stable releases of H2O as well as the bleeding edge nightly build
• CRAN has a policy of updating packages every few weeks to months so the most recent or the last stable release would be available
• Git has most recent changes committed and a build will be made nightly from the source code, however stability is not guaranteed

## Dependencies¶

The H2O package is built with some required packages so in order to properly install H2O’s package remember to install the following dependencies all of which is available in CRAN:

• RCurl
• bitops
• rjson
• statmod
• tools

Step 1

Download one of the release from our website. The downloaded package will contain both the H2O jar file as well as the R tar package file for R installation. After download completes, unzip the file and navigate to the R subdirectory with the tar package.

$unzip h2o-2.7.0.1497.zip$ cd h2o-2.7.0.1497/R
$pwd /c/Users/Amy/Downloads/h2o-2.7.0.1497/R Step 2 Start up R or Rstudio and install the R client package by running install.packages and inputting the location of the tar file. Finally load the library and check that a simple demo script runs. > install.packages("C:/Users/Amy/Downloads/h2o-2.7.0.1497/R/h2o_2.7.0.1497.tar.gz", repos = NULL, type = "source") > library(h2o) > demo(h2o.glm) ## Download R Package directly from 0xdata.com¶ Navigate to one of releases available on our website. Select the INSTALL in R tab and follow the R code for installation. # The following two commands remove any previously installed H2O packages for R. if ("package:h2o" %in% search()) { detach("package:h2o", unload=TRUE) } if ("h2o" %in% rownames(installed.packages())) { remove.packages("h2o") } # Next, we download, install and initialize the H2O package for R. install.packages("h2o", repos=(c("http://s3.amazonaws.com/h2o-release/h2o/master/1497/R", getOption("repos")))) library(h2o) localH2O = h2o.init() # Finally, let's run a demo to see H2O at work. demo(h2o.glm) ## Download from CRAN¶ When downloading from CRAN keep in mind that the initial download from CRAN contain only the R package but when running h2o.init() for the first time R will automatically download the corresponding H2O jar file, before launching H2O. > install.packages("h2o") > library(h2o) > localH2O = h2o.init() H2O is not running yet, starting it now... Performing one-time download of h2o.jar from http://s3.amazonaws.com/h2o-release/h2o/rel-knuth/11/Rjar/h2o.jar (This could take a few minutes, please be patient...) ## Make a build from Git¶ Step 1 For developers who want to actually make changes to the R package before building and installing it, start with pulling the source code from Git and follow the instructions in From Source Code (Github). Step 2 Once a build has been made, navigate to the target directory and subsequently to the Rcran folder with the R package and run an install. Amy@LENOVO-PC ~/Documents/h2o/target/Rcran (master)$ R CMD INSTALL h2o_2.7.0.99999.tar.gz
* installing to library 'C:/Users/Amy/Documents/R/win-library/3.0'
* installing *source* package 'h2o' ...
** R
** demo
** inst
Warning: package 'statmod' was built under R version 3.0.3
Creating a generic function for 'summary' from package 'base' in package 'h2o'
Creating a generic function for 'colnames' from package 'base' in package 'h2o'
Creating a generic function for 't' from package 'base' in package 'h2o'
Creating a generic function for 'colnames<-' from package 'base' in package 'h2o'
Creating a generic function for 'nrow' from package 'base' in package 'h2o'
Creating a generic function for 'ncol' from package 'base' in package 'h2o'
Creating a generic function for 'sd' from package 'stats' in package 'h2o'
Creating a generic function for 'var' from package 'stats' in package 'h2o'
Creating a generic function for 'as.factor' from package 'base' in package 'h2o'
Creating a generic function for 'is.factor' from package 'base' in package 'h2o'
Creating a generic function for 'levels' from package 'base' in package 'h2o'
Creating a generic function for 'apply' from package 'base' in package 'h2o'
Creating a generic function for 'findInterval' from package 'base' in package 'h2o'
** help
*** installing help indices
** building package indices
** testing if installed package can be loaded
*** arch - i386
Warning: package 'statmod' was built under R version 3.0.3
*** arch - x64
Warning: package 'statmod' was built under R version 3.0.3
* DONE (h2o)

Step 3

Check that H2O is install properly by running:

> library(h2o)
> localH2O = h2o.init()