Installation of the GLUE program

Generalized Likelihood Uncertainty Estimation

The GLUE program was developed using the R statistical programming language. So, you should have it installed on your computer before you go further. The DSSAT installation disk has an option to install R, as shown below. You should select the Install R button so that R will be available for use in estimating genetic coefficients using the GLUE program.

Figure 1. Installation screen of DSSAT.

After installing R version 2.10.1 in your machine (from the DSSAT installation disk as shown above), you should configure R to be used with GLUE. The R program requires two packages, MASS and xlsReadWrite, to run the GLUE program. To install them, follow these steps:

Installing the R packages MASS and xlsReadWrite

1.	Run R with Administrator privileges in sessions where you want to install packages. Do so by right-clicking on the R shortcut and selecting 'Run as Administrator'.

2.	Using the File pull-down menu on R, Select change dir and browse to the DSSAT45/Tools/GLUE/Install directory. Hit OK to close the window (Figure 2).

Figure 2. R File pull-down menu screen.

4.	Using the File pull-down menu on R, Select Source R code and select GLUE_setup.R and then hit Open. By selecting this file, both packages needed for GLUE (MASS and xlsReadWrite) will be installed (Figure 3).

Figure 3. R package selection screen.

5.	A message will show up in the command space to show you the package has been successfully installed. The package R_packages_path.r does not need to be installed (Figure 4).

Figure 4. R message on the package installation process.

6.	You can close R and go back to DSSAT.

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