home.md

@@ -65,6 +65,39 @@ To learn how to use these functions you can start by giving a look at the exampl
   plot_timeseries.R
   plot_maps.R
 ```
+#### Use a development version
+
+If you want to use an old version or a version still in development of the s2dverification, download the repository folder to your computer and check-out to the branch that contains the version you want to use.
+
+Set the following environment variables with the commands
+
+```r
+R_LIBS="/usr/local/lib/R/site-library:/usr/lib/R/library:/usr/lib/R/site-library:/cfu/software/R/debian7"
+ export R_LIBS
+ _R_CHECK_RD_XREFS_=false
+ export _R_CHECK_RD_XREFS_
+```
+Go to the repository directory and build the package tarball with the command
+
+```r
+R CMD build /path/to/repository
+```
+
+this will create a .tar.gz file in the current directory (repository main folder) with the source files compressed, ready to install.
+
+Install the package locally with the command
+
+```r
+R CMD INSTALL -l /path/where/to/install /path/to/tarball.tar.gz
+```
+
+Then you can load the library in R with the command
+
+```r
+library(s2dverification, lib.loc = '/path/where/to/install')
+```
+
+and it will be ready to use.
 
 
 #### [Change log] (change_log)