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Thanks for the reply Sean. According to that check, the data is as I posted the first time, rounded to three digits.  It could be due to how Excel is saving the data.  I just checked in notepad and found everything is in sci notation (rounded to......
Does q[z_,t_] = stuff differ from q[z_,t_] := stuff I thought the underscore did the same thing as :=, but I guess my reading of the documentation mislead me. It does change my results, so that seems to have overcome my error.  Thanks!  Of...