Value |
Category |
-99 |
-99.Observation not possible |
-55 |
-55.Missing |
1 |
1.Ash |
2 |
2.Mud |
3 |
3.Ash and Mud |
4 |
4.Neither observed |
Sysmiss |
|
Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.