Nov 22, 2013
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I am trying to determine how many times a value occurs in each quartile in a data set, with the range of my quartiles changing for each row.
Above is a simplified sample of the data I am working with. What I would like to do is calculate the length of a quartile for each row, then determine whether "Red" is in the 1st, 2nd, 3rd, or 4th quartile
Right now I have two output tables. The first is a "Quartile" table, which for each row counts the number of values entered, divides by four, multiplies by the appropriate quartile and rounds down. For this I use the function
For Q1 in this dataset, that is =rounddown(counta($B2:$I2)/4*(1))
Then I have a table which calculates whether "Red" occurs in each quartile, with references to the cell values in my quartile table. My formula for Q1 here is
=countif(index(row#2,1,match(Q1 value,$row#1,0)):Index(row#2,1,match(Q1 value,$row#1,0)),"Red".
The actual formula (can be used if pasting table values into excel) is:
Where Q1 equals my rounddown formula noted above, returning "1" in this case. For subsequent quartiles, I change my reference in the Match formula to start with the previous quartile +1, and end with the current quartile.