someone please help, I cannot get passed nan to nan interval error

[David Szenasi]

I'm not positive but it would be a large coincidence that I picked the only
seven day chunk of data that had real values.  That's what has me  stuck.  I
also received the data from a professor who has done operations  on the data
and it looked good.  Anything else you can think of.
David Szenasi
UNM
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