The goal of graph4lg is to make easier the construction and analysis of genetic and landscape graphs in landscape genetics studies (hence the name graph4lg). The package allows to weight the links and to prune the graphs by several ways. To our knowledge, it is the first software which enables to create genetic graphs with such a large variety of parameters. Besides, it allows to carry out preliminary analyses of the spatial pattern of genetic differentiation in order to choose the best genetic distance and pruning method in every context. Lastly, it makes possible the comparison of two spatial graphs sharing the same nodes.


You can install the released version of graph4lg from CRAN with:



The package includes a tutorial with examples showing why and how to use each of the included functions. The package also includes data sets in order to test the functions.

More complete tutorials in English or French language are available for more details.