}}}
=== Options ===
- * -f=<first> : first gene tree to analyze (0-based index)
- * -l=<last> : last gene tree to analyze (0-based index)
- * -r=<re-rooting> : re-rooting method for gene trees, possible values or 'none', 'midpoint', or 'outgroup' (default: by minizming duplications)
- * -o=<outgroup> : for rooting by outgroup, name of outgroup (external gene tree node)
- * -b : to use SDIR instead of GSDIR (faster, but non-binary species trees are disallowed)
+ * `-f=<first>` : first gene tree to analyze (0-based index) (default: analyze all gene trees)
+ * `-l=<last>` : last gene tree to analyze (0-based index) (default: analyze all gene trees)
+ * `-r=<re-rooting>` : re-rooting method for gene trees, possible values or 'none', 'midpoint', or 'outgroup' (default: by minizming duplications)
+ * `-o=<outgroup>` : for rooting by outgroup, name of outgroup (external gene tree node)
+ * `-b` : to use SDIR instead of GSDIR (faster, but non-binary species trees are disallowed)
==== Gene trees ====
=== Example ===
`rio gene_trees.nh species.xml outtable.tsv log.txt`
+`rio gene_trees.nh species.xml outtable.tsv log.txt -r=outgroup -o=XVL1_ECOLI`
=== Example files ===
* [http://forester.googlecode.com/files/gene_trees_rio.nh gene trees file]