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average if - between range
Hi
I have the following data Col-A Col-B 1/10/2009 10:20 0.006 1/10/2009 10:22 0.007 1/10/2009 10:24 0.006 ........ 1/06/2010 15:00 0.015 etc What I would like to be able to do, is to calculate the average of the vaules in Col B only between certain time periods i.e. 2am and 4am for each day in the data set Any help appreciated. Many Thanks Chris |
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