## Count groups in calendar

**Question: **

Sam asks:

Is there a formula that can count blocks

For eg in your picture (see picture above) if the green blocks had the letter G and the Red blocks had the letter R and I had to return 4 as the answer -3G + 1R

Is this possible through a formula?

*You can find the question here:
Count overlapping dates in excel*

**Answer:**

The image above shows the groups in row 3, the formula in cell B16 counts the number of groups.

**Formula in B16:**

### Explaining formula in cell B16

=SUMPRODUCT(--($B$3:$AE$3<>$C$3:$AF$3), --($C$3:$AF$3<>""))+($B$3<>"")

**Step 1 - Check if next cell is not equal to current cell**

=SUMPRODUCT(**--($B$3:$AE$3<>$C$3:$AF$3)**, --($C$3:$AF$3<>""))+($B$3<>"")

--($B$3:$AE$3<>$C$3:$AF$3)

becomes

--({"G", "G", 0, "G", "G", "G", "R", "R", "R", "R", "R", "R", "R", "R", "R", "G", "G", "G", "G", "G", "G", "G", 0, 0, "G", "G", "G", "G", 0, "G"}<>{"G", 0, "G", "G", "G", "R", "R", "R", "R", "R", "R", "R", "R", "R", "G", "G", "G", "G", "G", "G", "G", 0, 0, "G", "G", "G", "G", 0, "G", "G"}

becomes

--({FALSE, TRUE, TRUE, FALSE, FALSE, TRUE, FALSE, FALSE, FALSE, FALSE, FALSE, FALSE, FALSE, FALSE, TRUE, FALSE, FALSE, FALSE, FALSE, FALSE, FALSE, TRUE, FALSE, TRUE, FALSE, FALSE, FALSE, TRUE, TRUE, FALSE})

and returns

{0, 1, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 1, 0}

**Step 2 - Check if cells are empty**

=SUMPRODUCT(--($B$3:$AE$3<>$C$3:$AF$3), **--($C$3:$AF$3<>"")**)+($B$3<>"")

--($C$3:$AF$3<>"")

becomes

--($C$3:$AF$3<>"")

becomes

--({TRUE, FALSE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, FALSE, FALSE, TRUE, TRUE, TRUE, TRUE, FALSE, TRUE, TRUE})

and returns

{1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 0, 1, 1}

**Step 3 - Check if first cell is not empty**

=SUMPRODUCT(--($B$3:$AE$3<>$C$3:$AF$3), --($C$3:$AF$3<>""))+**($B$3<>""**)

($B$3<>"")

returns TRUE

**Step 4 - All together**

=SUMPRODUCT(--($B$3:$AE$3<>$C$3:$AF$3), --($C$3:$AF$3<>""))+($B$3<>"")

becomes

=SUMPRODUCT({0, 1, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 1, 0}, --($C$3:$AF$3<>""))+($B$3<>"")

becomes

=SUMPRODUCT({0, 1, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 1, 0}, {1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 0, 1, 1})+($B$3<>"")

becomes

=SUMPRODUCT({0, 1, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 1, 0}, {1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 0, 1, 1})+TRUE)

becomes

=5+TRUE

and returns 6.

**Functions in this article:**

**SUMPRODUCT(**array1, array2, **)**

Returns the sum of the products of the corresponding ranges or arrays

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**Contact Oscar**

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Oscar..Thanks for this brilliant formula.

One more question for the Calendar that you have set up above can we have a excel formula which will give us a below table

StarWk EndWk Name

1 2 G

4 6 G

7 15 R ... and so on

Sam,

Read this post: https://www.get-digital-help.com/2010/08/29/extract-dates-from-a-cell-block-schedule-in-excel/