Is there a way in perl to impute missing data?

I have a 2-D array where missing data is encoded by 9, and the real data exists in a state of either 0,1 or 2. If I export only unique rows in the array I get 8 rows however two of these rows contain missing data and imputation of one of the other three values means that only 6 rows should be displayed

eg

2 2 0 1 0 
2 2 0 2 1 
0 2 1 1 0 
0 1 1 1 0 
2 2 0 0 0 
2 9 0 2 1 
0 2 0 1 0 
2 2 0 9 0

[download]

The row's containing 2 9 0 2 1 and 2 2 0 9 0 should be removed. Is there a perl module that can do this easily ?

In reply to Imputation of data by garyboyd

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