!SUBSET EnvC Env 3 5 8 9 :15 21 33defines model term EnvC which is a factor of 12 (since there are 12 elements in the list), being a reduced form of the factor Env just selecting the environments listed. It might be used in the model in an interaction to fit say column effects for the nominated environments. The intention is to simplify the model specification in MET (Multi Environment Trials). Missing values are transmitted as missing and records whose level is zero are transmitted as zero.
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