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Culling sparse data

Some markers or traits may have been typed for a small proportion of individuals in the dataset. Such markers or traits can be eliminated from the data set. Option 5 will allow you to specify a trait number, and then eliminate individuals with missing data for that trait. Choosing option 6 will require a tolerance level for the percentage of missing marker data. The -M option specifies this number, which must be in the range $(0.0,
100.0)$. If option 6 is selected, Prune will eliminate individuals with this percentage of missing marker data.

Christopher Basten 2002-03-27