Drop records on input
ASReml will automatically delete data records which have a missing value
in the response variable unless the analysis is a
or the model term
is fited in the
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.
is used after
should refer to the encoded factor level rather than the value in the
yield !D <= 0 # Drop records with 0 or negative values.