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#1
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Count cells in range that restarts at intervals
I have a table like this:
Row Name Y/N? No. of Y 1 Adam Y 1 2 Adam Y 2 3 Adam N 2 4 Adam N 2 1 Brian Y 1 2 Brian N 1 3 Brian N 1 4 Brian Y 2 Is there a formula I can put for "No. of Y" that counts the no. of times "Y" appears for Adam from the first "Adam" row up to the current row? The counting should restart for Brian and not accumulate from Adam's total. Note that the starting point for each person is when "Row" = 1. Can a pivot table help? |
#2
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Understood that perfectly! :D
So why don't I have to use ctrl+shift+enter since this is an array formula? "Rowan" wrote: The -- is a double unary minus which forces the Sumproduct function to Convert True and False answers to 1's and 0's. More confused now? There is a great explanation of Sumproduct at http://www.xldynamic.com/source/xld.SUMPRODUCT.html and further explanation of the double unary minus from Bob Phillips and Harlan Grove at http://tinyurl.com/bv42x Hope this helps Rowan |
#3
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=Sumproduct() behaves like an array formula, but you don't need the
ctrl-shift-enter stuff. That doesn't answer why, though. I'd guess it's just the way the developers designed the function. Melissa wrote: Understood that perfectly! :D So why don't I have to use ctrl+shift+enter since this is an array formula? "Rowan" wrote: The -- is a double unary minus which forces the Sumproduct function to Convert True and False answers to 1's and 0's. More confused now? There is a great explanation of Sumproduct at http://www.xldynamic.com/source/xld.SUMPRODUCT.html and further explanation of the double unary minus from Bob Phillips and Harlan Grove at http://tinyurl.com/bv42x Hope this helps Rowan -- Dave Peterson |
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