Count unique distinct values within same week, month or year
The array formula in cell E3 counts unique distinct items for all dates within the same week. Example, week 2 has two unique distinct items: 1150 and 1131.
Unique distinct values are all values but duplicates are merged into one value.
Formula in B3:
Array formula in E3:
How to create an array formula
- Copy (Ctrl + c) and paste (Ctrl + v) array formula into formula bar.
- Press and hold Ctrl + Shift.
- Press Enter once.
- Release all keys.
Copy cell E3 and paste it down as far as needed.
Item is named range pointing to cell range D3:D11.
Explaining array formula in cell E3
=SUM(--((FREQUENCY(IF(YEAR(C3)&"-"&B3=YEAR($C$3:$C$11)&"-"&$B$3:$B$11, Item, ""), Item))>0))
Step 1 - Filter records in date range
=SUM(--((FREQUENCY(IF(YEAR(C3)&"-"&B3=YEAR($C$3:$C$11)&"-"&$B$3:$B$11, Item, ""), Item))>0))
IF(YEAR(C3)&"-"&B3=YEAR($C$3:$C$11)&"-"&$B$3:$B$11, Item, "")
becomes
IF("2010-2"={"2010-2";"2010-2";"2010-2";"2010-2";"2011-3";"2010-3";"2010-3";"2010-3";"2010-3"}, Item, "")
becomes
IF({TRUE;TRUE;TRUE;TRUE;FALSE;FALSE;FALSE;FALSE;FALSE}, {1150; 1150; 1131; 1131; 1126; 1151; 1150; 1131; 1131}, "")
and returns
{1150;1150;1131;1131;"";"";"";"";""}
Step 2 - Calculate frequency
=SUM(--((FREQUENCY(IF(YEAR(C3)&"-"&B3=YEAR($C$3:$C$11)&"-"&$B$3:$B$11, Item, ""), Item))>0))
FREQUENCY(IF(YEAR(C3)&"-"&B3=YEAR($C$3:$C$11)&"-"&$B$3:$B$11, Item, ""), Item))
becomes
FREQUENCY({1150;1150;1131;1131;"";"";"";"";""}, {1150; 1150; 1131; 1131; 1126; 1151; 1150; 1131; 1131}))
and returns
{2;0;2;0;0;0;0;0;0;0}
Step 3 - Count and sum values larger than 0 (zero)
=SUM(--((FREQUENCY(IF(YEAR(C3)&"-"&B3=YEAR($C$3:$C$11)&"-"&$B$3:$B$11, Item, ""), Item))>0))
becomes
=SUM(--(({2;0;2;0;0;0;0;0;0;0})>0))
becomes
=SUM(--({TRUE; FALSE; TRUE; FALSE; FALSE; FALSE; FALSE; FALSE; FALSE; FALSE}))
becomes
=SUM({1;0;1;0;0;0;0;0;0;0})
and returns 2 in cell E3.
Download Excel *.xlsx file
Count-unique-occurences-within-same-week-month-year.xlsx
Count unique distinct values within same month
Array formula in E16:
How to create an array formula
- Copy (Ctrl + c) and paste (Ctrl + v) array formula into formula bar.
- Press and hold Ctrl + Shift.
- Press Enter once.
- Release all keys.
Copy cell E16 and paste it down as far as needed.
Count unique distinct values within same year
Array formula in E29:
How to create an array formula
- Copy (Ctrl + c) and paste (Ctrl + v) array formula into formula bar.
- Press and hold Ctrl + Shift.
- Press Enter once.
- Release all keys.
Copy cell E29 and paste it down as far as needed.
Download excel sample file
Count-unique-occurences-within-same-week-month-year.xls
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8 Responses to “Count unique distinct values within same week, month or year”
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Oscar,
You don't need the countif part, you could directly be constructing the Frequency structure, using the name range "Item"
=SUM(--(FREQUENCY(IF(YEAR(C3)&"-"&B3=YEAR($C$3:$C$11)&"-"&$B$3:$B$11,Item,""),(Item))>0))
Or am I missing something here
Yes, you are right.
But if "Item" is text (not numbers), frequency won´t be able to "count" them. COUNTIF($D$3:$D$11, "<"&$D$3:$D$11) converts all possible text values to numbers. In my example I use only numbers so my solution might seem strange. I wanted to create a more general solution if people use "Item" numbers like this: A111, A112 and so on. Thanks your contribution! /Oscar
And I now see the light! Thanks Oscar!
How then would I run or fit in the countif, if I had text that I had to look for distinct values. I have text values in item column. David
how about unique distinct values within same day? looking forward to your response.
beginner,
Array formula in cell F4:
Download excel *.xlsx file
count-unique-distinct-values-within-the-same-day.xlsx
thank you, oscar.
How Can I also count "A" and "a" two different distinct values ?