"Resetting" Average in Excel - excel

Please pardon my poor explanation of my problem, any insight would be greatly appreciated.
I am using an average in excel that begins at a fixed cell and fills down.
For example: column B contains values, and column C contains the formula =AVERAGE($B$1:B1) filled down, so at row 10 the formula is =AVERAGE($B$1:B10)
I am wondering if there is a way to calculate this average that will "reset" when the value in the column A changes. Getting a formula for whether column A changes is easy using an IF function but I don't know how to change the reference cell when the average "resets." I attempted to attach an image with the formulas but I do not have 10 reputation so here is a link to a short example sheet:
https://drive.google.com/file/d/0BymZUcneHsYgUnRoYkRkdnJYbmM/view?usp=sharing
I would prefer do accomplish this without VBA if possible.
Thank you very much.
EDIT: would it be possible to have a count function next to the data column that starts over when column A switches from "A" to "B" (or "B" to "A"), then I could simply use an average offset with the resulting value to get the desired average?

You should use the =AVERAGEIF function.
=AVERAGEIF($A$1:A1,A1,$B$1:B1)

Here's how I ended up solving this:
I used =ROW()-MAX(INDEX((A$1:A2<>A2)*ROW(A$1:A2),0 to count down until "A" changed to "B" or vice versa, then used =ROW()-MAX(INDEX((A$1:A2<>A2)*ROW(A$1:A2),0 to average the data with the offset calculated in the previous formula.
Note that the data was still in column B, with "A" or "B" in column A, and these two formulas were placed in I and J, respectively
Thank you very much for all your help

You can use Indirect to resolve a custom range. Since values in "A" can come multiple time in distinct block, you will have to add an extra column to keep track of the starting row of each range :
(starting from row 2, [C1] = 1)
=IF(A2<>A1,ROW(A2),C1)
the result will be in column "D" :
=AVERAGE(INDIRECT("B"& C1 &":B"&ROW(A1)))

Related

How to report cell value to another cell on excel

I'm entering datas in A column of a table. According to the datas, I making sums from the yellow cell (actually this yellow cell is the high value of the A column). So all 10 cells, there is a sum until the end of datas.
I'm looking for automatically report the seven first grey cells (the sums)to another table. The problem is, according to the datas, high value is not at the same place so the sums are not to the same place too.
How can I do ?
Thank you for your help
MY ERROR :
And the message when I press ctrl maj enter in same time :
You might use this array formula in your report.
=INDEX($F:$F,SMALL(ROW($F$4:$F$117)+(100*(F$4:$F$117="")), ROW(F1)))&""
Bear in mind that, as an array formula, it must be confirmed with Control+Shift+Enter. Enter the formula in the row where you have Somme = 1, then copy down to 6. Note that Row(F1) is a counter. You have a similar counter (1 to 6) in F124:F130. Therefore you can replace ROW(F1) with $F124 (if that is where the "1" is) to make it easier to understand, perhaps.
The formula retrieves the value of the 1st, 2nd, 3rd etc non-blank cell in the range F4:F117. If those cells contain a formula they will be considered "blank" if their result equals "".
BTW, if you don't always have 113 results to evaluate you might consider giving a name to the range E4:E117. For example, if you name that range as "Results" then =SUM(Results) would be the same as =SUM($E$4:$E$117), but as you insert or delete rows within the named range the formula doesn't need to be amended. Use of a named range would simplify understanding your existing formula. You could do the same with column F.
Finally I find a solution to report the values from F to another table. As values positions are dependant of the MAX raw in E (every 10 cells) I make this formula :
For the first : INDEX(E4:F117;EQUIV(GRANDE.VALEUR($E$4:$E$117;1);$E$4:$E$117;0)+10;2)
For the second :
INDEX(E4:F117;EQUIV(GRANDE.VALEUR($E$4:$E$117;1);$E$4:$E$117;0)+20;2)
Etc...

How do I Count cells in excel, starting with a cell that has a specified value?

The question is slightly confusing, so I will do my best to elaborate. I have a series of cells in a row with all of the cells in the row with a value of 0 and one cell having a value of 1. I want to use the COUNT function to count all of the cells to the right of the cell that contains the value of 1, including that cell. I would then use this number of counted cells in another equation. Does anyone have any suggestions on how to do this? I have tried using a lookup function inside of the count function, but it has not worked. This is my closest guess:
=COUNT(Lookup(1,A1:J1):J1)
This results in an error. Do I need to use VBA to make this work or should I be able to write an equation? I appreciate the help, or if there are any other strategies that I can use to attain the result I am looking for.
Edit: I am adding in some sample data and expected results. I am trying to count all of the cells to the right of the "1" including the cell containing the "1". So in this example, I would expect the formula to return "13" as there are 12 cells to the right of the "1"
You can use OFFSET() and MATCH():
That last "50" is a bit of a guess since I'm not sure how far to the right you want to count...
...and re-reading your question it's not clear if you only want to count values of 1 or if you also need to count other values as long as they're to the right of the first 1.
With data in A1 through J1, consider:
=10-MATCH(1,A1:J1,0)+1
In this case. 4 is the number of cells from G1 through J1, inclusive.
Assuming your range of 0 and 1 values is in row 2, starting from column B, use this formula in B3 and copy it across for as far as you need:
=IFERROR(COUNT($B2:B2)+1-MATCH(1,$B2:B2,0),0)
You could also use a formula of
=IF(A3>0,1+A3,IF(B2=1,1,0))
but that could cause issues if you have something in cell A3 itself.
You can use this formula:
=COUNTA(INDEX($A$1:$J$1,1,MATCH(1,$A$1:$J$1,0)):INDEX($A$1:$J$1,1,10))
The benefit to use this is it is not a volatile function, and it will also work for 1 appears in the last column.
You can use "COUNTIF" formula to count number of occurrences of specific number in a range of cells.
To count no of occurrences in a row.
=COUNTIF(1:1,1)
If it is in a column then
=COUNTIF(A:A,1)
Hope you are looking for a countif function.
COUNTIF(A1:A10, 1)
The above function counts the cell that has value 1 within the range A1:A10

SUM/COUNTIF in excel 2013

I'm having some issues with a formula. In the formula I'm trying to sum the number of items in column E based upon the condition in column C.The formula I've used is, (which is working correctly.)
=SUM(COUNTIFS('Sheet1'!E:E,C86,'Sheet1'!C:C,{"A","B","C","E1","E2","F","G","X","T"}))
However in the next cell I'm trying go a bit further and trying to count the number of "Yes" and "NA" in column R based upon the condition in column E and Column C. The formula I've used is -
=SUM(COUNTIFS('Sheet1'!E:E,C86,'Sheet1'!C:C,{"A","B","C","E1","E2","F","G","X","T"},'Sheet1'!R:R,{"Yes","NA"}))
This time the formula is counting only "A" in column C and "Yes" in column R. It'll be great help if someone can point what mistake I'm making with this formula.
Thanks in advance!
Best Regards,
gmainak
Change 'Sheet1'!R:R,{"Yes","NA"} to 'Sheet1'!R:R,{"Yes";"NA"}
You can only do two arrays and one needs to be vertical ; and the other horizontal ,:
=SUM(COUNTIFS('Sheet1'!E:E,C86,'Sheet1'!C:C,{"A","B","C","E1","E2","F","G","X","T"},'Sheet1'!R:R,{"Yes";"NA"}))

Excel Formula with IF... ELSE

Hi all,
I have this excel where by I need to find the location of the item if they are found in column B.
So In my F column, I tried to write ifelse formula which didnt work.which is
=IF(D2="NULL","NONE",C((D2))).
My idea is if D2 is not null, use the value in D column to find the location in C column. In this example, fish no 4, so it is found, my F column should show the value "C" using the value shown in D column and use it as Row no in C column
I hope you guys get the idea and help me out a newbie in excel. Thanks in advance
=vlookup($D2,$A$2:$C$6,3,0)
you can use that in column F. Place that formula in F2 and copy down.
you could technically use it in column E as well, but you would need to change the 3 to a 2.
you did not say what you wanted to do if the D value was "Null" so I am going to take a stab at the dark and wrap you lookup formula in an if statement that will deal with "Null" or empty cells
=IF(OR($D2="NULL",$D2=""),"",VLOOKUP($D2,$A$2:$C$6,3,0))
That is the alternative formula to place in F2 and copy down.
Use the formula:
=IF(D2<>"NULL",VLOOKUP(D2,A2:C6,3,FALSE),"Value is NULL")
Here is the working example:
Put formula in cell F2 and drag it down.
[edit]to pull proper location column, not just the row #[/edit]
Seems like a job for MATCH+OFFSET
Try this formula in cell F2:
=OFFSET($C$1, MATCH(E2,B:B,0)-1, 0, 1, 1)
Match is used to locate the value in the first argument (ie E2) within the range specified in 2nd argument (ie B:B). I use B:B but you could also use range B2:B30 or whatever more specific range you want. (I prefer the more generic B:B, though :) )
Third paramter "0" just indicates "Exact match".
This function will retun "#N/A" if nothing found.
OFFSET takes the result from MATCH to pick out the Location you want. The first parameter in OFFSET is the rows below (or above if negative) from the base row (in this case $C$1). the next is the column: 0 since we're in the column we want to be in. The last two are the size of the range: 1,1 is a 1x1 cell, so just 1 cell. If we did ...,2,3), that would be 2 rows high and 3 columns wide - or a 6 cell range. We're just after 1 cell here.
I've always preferred MATCH + OFFSET to other options, I just found they held up more robustly to changes in a sheet (ie new rows/columns added). So it's mostly personaly preference over VLOOKUP and INDEX. I honestly have never compared their actual performance, however, I've never had any issues with MATCH+OFFSET running slowly :)

Excel Problems- Calculated value as a cell reference

I'm relatively new to excel programming. I'm working on making a spread sheet that shows exponential decay. I have one column (A1:A1000) of 1000 random numbers between 1 & 10 using the TRUNC(RAND()*10,0) in each cell. The next Column (B1:B1000) has a logic mask =IF(A1=0,1,0) , where if the value in the A cell is 0, then the B cell shows a 1. Next, to find the number of 0's in the A column, I have the next column taking the sum of B1:B1000, which returns the number of 0's that showed up in the first column. I'm sure there's an easier way to do that, but this seems to work fine.
Here's my problem, hopefully it's clear what I'm asking:
Next, I want to take the sum of the logic column (B) from B1:B(1000- the value of the sum from (B1:1000)) in the cell below the cell that calculates sum(B1:B1000). Is there a way to to algebra in a cell formula to reference a cell? More simply, if I want to refer to A3, for example, is there a way to input something like A(2+1) to get A3? Does this make sense?
You can very easily do, in VBA:
ActiveCell.Formula = "=A" & (2+1) & "+15"
In Excel:
=INDIRECT(ADDRESS(2+1, COLUMN(A1)))+15
This will set the formula to "=A3+15". Generally, this is best done with variables, so remember to do that.
In Excel, and as pointed out by Eric, you can write the referance to the cells just like normal strings thanks to INDIRECT() function.
Just make sure that the string passed to INDIRECT() is a valid cell reference.
For example :
=SUM(INDIRECT("B" & 2+7*(H2-1)):INDIRECT("B"&(2+7*H2)-1))
Here, I sum 7 lines for each week (H2). It gives the sum of B2:B8, B9:B15, B16:B22, etc.
Hope my example will help you figure out how to use it in real situation.

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