Below we load the file genes.rda containing a named vector genes. This vector contains the function descriptions of a set of genes. The names of this vector give the COG codes of these genes:

 

> head(genes, n = 10)
                                                               RCOG3478 
"Predicted nucleic-acid-binding protein containing a Zn-ribbon domain " 
                                                               CCOG1031 
                                 "Uncharacterized Fe-S oxidoreductase " 
                                                               SCOG3771 
                                          "Predicted membrane protein " 
                                                               KCOG1191 
               "DNA-directed RNA polymerase specialized sigma subunit " 
                                                               SCOG5230 
                                   "Uncharacterized conserved protein " 
                                                               JCOG0532 
                      "Translation initiation factor 2 (IF-2; GTPase) " 
                                                               CCOG1905 
                        "NADH:ubiquinone oxidoreductase 24 kD subunit " 
                                                               FCOG0461 
                                   "Orotate phosphoribosyltransferase " 
                                                               SCOG2904 
                       "Uncharacterized protein conserved in bacteria " 
                                                               ECOG0509 
                 "Glycine cleavage system H protein (lipoate-binding) " 
...

 

Question: Use this vector to create a character vector geneclass with the values “Predicted”, “Uncharacterized” and “Described”. These are defined as follows:

 

• If the gene description contains “Uncharacterized”, it is always called “Uncharacterized”.
• If the gene description contains “Predicted” but not “Uncharacterized”, it is called “Predicted”.
• All other genes are called “Described”.