@@ -699,12 +699,18 @@ They use respectively the `biomaRt` package and the `org.XX.eg.db` packages.

 anno_df_biomart <- get_annotation(dds = dds_airway,

                                   biomart_dataset = "hsapiens_gene_ensembl",

                                   idtype = "ensembl_gene_id")

+```

+```{r}

 anno_df_orgdb <- get_annotation_orgdb(dds = dds_airway,

                                       orgdb_species = "org.Hs.eg.db",

                                       idtype = "ENSEMBL")

+

+head(anno_df_orgdb)

 ```

+If using datasets and annotation packages for yeast samples (*Saccharomyces cerevisiae*, and the `org.Sc.sgd.db` package), remember to specify the `key_for_genenames` in the call to `get_annotation_orgdb` (an error message is thrown otherwise).

+

 ## `pair_corr`

 Plots the pairwise scatter plots and computes the correlation coefficient on the expression matrix provided.