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<p>Hi all,</p>
<p>This is probably an easy solution but if I have 96 hours worth of precipitation data but I need to subtract the previous value for an hourly output how would I go about this? For example hour 2 would need to subtract hour 1, then hour 3 would need to subtract hour 2 and so on......</p>
<p>Thanks in advance!!! </p>
<div>-- <br />
<p>Stuart Markham</p>
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