Glad this worked! By the way, the new rcrop utility described in this post can extract any vector from a matrix, and is probably better-suited than your (admittedly clever) use of rcollate.
              
              
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            Glad this worked! By the way, the new rcrop utility described in this post can extract any vector from a matrix, and is probably better-suited than your (admittedly clever) use of rcollate.