Nutzt die oben aufgeführten Funktionen um die Metadaten des Objekts hnscc
zu explorieren:
table(hnscc$alcohol)
##
## NO YES
## 85 188
table(hnscc$neoplasm_site)
##
## Alveolar Ridge Base of Tongue Buccal Mucosa Floor of Mouth Hard Palate
## 7 12 8 26 5
## Hypopharynx Larynx Lip Oral Cavity Oral Tongue
## 2 72 1 49 76
## Oropharynx Tonsil
## 2 19
table(hnscc$grade)
##
## G1 G2 G3 G4 GX
## 23 176 71 1 8
table(hnscc$grade, useNA="always")
##
## G1 G2 G3 G4 GX <NA>
## 23 176 71 1 8 0
summary(hnscc$pack_years)
## Min. 1st Qu. Median Mean 3rd Qu. Max. NA's
## 0.01685 30.00000 45.00000 50.62485 60.00000 300.00000 125
table(is.na(hnscc$pack_years))
##
## FALSE TRUE
## 154 125
summary(hnscc$days_to_death)
## Min. 1st Qu. Median Mean 3rd Qu. Max. NA's
## 0.0 218.8 443.0 789.0 999.2 6416.0 1