Drop records on input

Automatic dropping

ASReml will automatically delete data records which have a missing value in the response variable unless the analysis is a multivariate analysis or the model term mv is fited in the linear model.

Explicit dropping

!D v removes records with v or 'missing value' in the field
One of the operators < <= <> >= > may be inserted before v to modify the set of records deleted.
If !D v is used after !A or !I, v should refer to the encoded factor level rather than the value in the data file.
 yield !D <= 0  # Drop records with 0 or negative values.

See Also