Hello Ken, Thank you for your response. I am a biologist and have only started using perl over the past month so am feeling a little lost. Your code does help a lot and is similar to what I require. I would need to add an additional to have it completely and shall read the references you posted. Thank you. ila

In reply to Re^2: Multidimensional hash help! by ila14
in thread Multidimensional hash help! by ila14

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