melanoma(faraway) R Documentation 

Melanoma by type and location
Description
Data comes from a study of Malignant Melanoma involving 400 subjects. 

Usage
data(melanoma)
Format
A data frame with 12 observations on the following 3 variables. 

count
number of cases 
tumor
type of tumor - a factor with levels freckle indeterminate nodular superficial 
site
location of tumor on the body - a factor with levels extremity head trunk 

> melanoma
   count         tumor      site
1     22       freckle      head
2     16   superficial      head
3     19       nodular      head
4     11 indeterminate      head
5      2       freckle     trunk
6     54   superficial     trunk
7     33       nodular     trunk
8     17 indeterminate     trunk
9     10       freckle extremity
10   115   superficial extremity
11    73       nodular extremity
12    28 indeterminate extremity