I have a matrix with 3 years of data (2006, 2009, 2010). I am trying to split this matrix by year so that I have 3 separate matrices. My matrix looks like this:
    Q16.1 Year Gender Grade1       3 2006      1     52       2 2006      0     53       3 2006      0     54       3 2006      0     55       3 2006      1     56       2 2006      0     57       3 2006      0     58       3 2006      1     59       3 2006      0     510      3 2006      0     511      3 2006      0     512      2 2006      0     5
Thanks


      
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