I have two columns:
Column A: Time (seconds from midnight)
Column B: Value (arbitrary value I've created)
How would I find the average value (column B) at any instance in time(row) looking back over the previous x seconds (column A)?
Lets assume A1 = Seconds after midnight
Seconds after midnight Value
0 27
2 29
6 2
16 29
20 19
24 4
34 2
40 1
44 4
54 12
64 12
71 3
81 30
91 21
92 1
93 27
97 12
104 30
112 25
Note that time deltas are variable so I can't just look at the last x rows.
A specific question would be:
In a new column (column C) return the average Value of the last 10 seconds of data.
I have no idea how to do this. Can anyone help? It'd be greatly appreciated.
EDIT:
The output in the first 4 rows of column C would be:
Seconds after midnight Value Result
0 27 No values prior to this one
2 29 27 Average(B2)
6 2 28 Average(B2:B3)
16 29 2 Average(B4)
For each row, I'm taking the current time (16 in the last case)...going back x seconds (10 seconds in this case) and then averaging the values from all the cells in that time range (not including the current value).
My main issue is the time calculation. I don't know how to calculate it as I roll forward in time and I continue to get more instances as we move forward. If we go 10 seconds without any new data point then there would be no output since. If we got one instance in the previous 10 seconds then the output would be that value. If we got 100 instances in the previous 10 seconds, I need to return the average of that 100 instances.
Again, I'd appreciate any help, hints, links. This is driving me crazy.
Try the following formula in cell C3:
=IFERROR(SUMIFS(B:B,A:A,"<"&A3,A:A,">="&A3-10)/COUNTIFS(A:A,"<"&A3,A:A,">="&A3-10),0)
SUMIFS will get the sum of all values for which the seconds are:
less than A3 (i.e. less than 2 in this case)
more or equal to A3-10 (i.e. above -8 in this case)
And this sum is divided by the number of lines found with the same criteria.
If now there is an error (more specifically when the COUNTIFS returns 0, you would get #DIV/0!) you simply get 0 instead of the error.
Related
Need help regarding Excel dynamically search based sum of two columns matching from two different tables.
I have got this Table of Data Entered One Time
A B C
1 Qlty Warp Weft
2 Stpl.1 150 20
3 Cotn.1 80 60
4 Stpl.2 20 20
5 Cotn.2 20 20
6 Stpl.3 20 40
in Column A2:A6, Quality can not be duplicated, its a unique Name
The Data entry and report Table is here
A B C D E F
8 Yarn Name Sent Bags Remaining Qualty Used Warp Used Weft
9 20 800 600 Stpl.1 71 200
10 150 101 30 Stpl.2 70 30
11 40 300 290 Stpl.3 100 10
12 20 400
C9:C5000 is Returning Column, Values are calculated on the base of Column A9:A5000 (Yarn Name)
Need to Find Yarn Name (eg:) "20" in B2:B6 AND/OR C2:C6, wherever it matches, index that Quality from A2:A6
Then match the returned qualities(could be more than one) to D9:D5000 and sum the mathced results from E9:F5000
I have tried so far in C12
=SUMIF($A$9:$A12,A12,$B$9:$B12)-(SUMIF($D$9:$D12,INDEX($A$2:$A$6,MATCH(A12,$B$2:$B$6,0)),$D$9:$D12)+SUMIF($D$9:$D12,INDEX($A$2:$A$6,MATCH(A12,$C$2:$C$6,0)),$D$9:$D12))
PS:- I am using Excel 2007
If I understand correctly, then following array formula can help you:
=SUM(IFERROR(INDEX($A$2:$A$6,N(IF(1,(MMULT(--($B$2:$C$6=A9),TRANSPOSE(COLUMN($B$2:$C$6)^0))>0)*(ROW($B$2:$C$6))-1)))=TRANSPOSE($D$9:$D$12),0)*TRANSPOSE($E$9:$E$12+$F$9:$F$12))
Array formula after editing is confirmed by pressing ctrl + shift + enter
Edit:
To calculate Warp and Weft columns separately use following array formula:
=SUM(IFERROR(INDEX($A$2:$A$6,N(IF(1,((A9=$B$2:$B$6)*ROW($B$2:$B$6))-1)))=TRANSPOSE($D$9:$D$12),0)*TRANSPOSE($E$9:$E$12))+SUM(IFERROR(INDEX($A$2:$A$6,N(IF(1,((A9=$C$2:$C$6)*ROW($C$2:$C$6))-1)))=TRANSPOSE($D$9:$D$12),0)*TRANSPOSE($F$9:$F$12))
I am working in excel and for some reason my sum or count function is not working properly. Or, perhaps I am not using the correct function or in the right way.
A B C D E F G H
February Max March Max
1 28
2
3
4
5
7
11
15
17
19
22
23
25
IF(SUM(A:A>0),28,"")
IF(SUM(E:E>0),31,"")
I have the above columns, I want the Max columns to show a specific number only if there is data in their respective month column. February has data, so it shows 28. March does not have any data so it shows no max. I need to look at the entire column or at least a large area (row 2 to row 2000).
The issue I am having is that if I do not have a value in the first row, but do have values in later rows, the sum or count function will to recognize that and will return zero.
A B
February Max
3
4
5
7
11
15
17
19
22
23
25
IF(SUM(A:A>0),28,"")
I have tried both sum and count functions, neither are giving me the results I want. I have also tried making >= 1. I found from StackExchange that someone was having a similar problem and a solution was to change the cell format to a number. That did not work either. Any suggestions?
Per my comment, you could use COUNTA() which checks if a cell is blank.
While it doesn't answer the technical reason SUM/COUNT isn't working, it should work for your intended purposes.
=IF(COUNTA(A:A)>0,28,"")
I'm sorry if this has been answered. I've been searching around for awhile now.
I have a times series dataset that I need to perform calculations on based on the previous x time (last hour,day, etc).
My issues is that I don't know how to run these calculations since the time deltas are not standardized.
Example:
Column A - Time (in seconds lets say)
Column B - Value
Time Value Result(5)
01 3 0
02 5 3
04 4 8
07 8 9
09 6 12
13 4 6
14 4 10
15 1 8
22 9 0
33 7 0
How could I return the Result(5) column by summing the last 5 seconds from that one instance (row) (not including it)?
Thank you.
EDIT:
To clear up what I'm trying to do:
1) Find the previous 5 secs of data using column A and return that range of rows
2) Using that range of rows for the 5 previous secs, sum column B
3) Output in Column C (formula)
The following formula should do what you need (paste into C2 and drag down):
=SUMIFS($B$2:$B$11,$A$2:$A$11,">="&A2-5,$A$2:$A$11,"<"&A2)
Where YourTime is the time in the row you wish to look back and sum over.
I've tested and it works for the data you provided - expand the ranges as appropriate.
Here’s a challenge for someone. I’m trying to round session times up to the nearest quarter hour (I report my total client hours for license credentialing)
8 minutes or above: round up to 15
23 minutes or above: round up to 30
38 minutes or above: round up to 45
53 minutes or above: round up to 60
Ex: in the first quarter hour, minutes below 8 will be their exact value: 1=1, 2=2, 3=3.
When 8 is entered, it is automatically rounded up to 15 (the same holds true for the rest of the hour: ex: 16=16, 17=17, 18=18, 19=19, 20=20, 21=21, 22=22. But 23 through 29 are all rounded up to 30.
Ideally, I could enter both hours and minutes in a single column, ex: 1.54
However, I realize that it may be necessary to create a separate column for hours and minutes in order to make this work (i.e., so that my formula is only concerned with rounding up minutes. I can add my hours and minutes together after the minutes are rounded.) Thus:
Column A = Hours (3 hours maximum)
Column B = Minutes
Column C = Minutes Rounded up to nearest ¼ hour
Column D = Col A + Col C
In column B I would like to enter minutes as 1 through 60 (no decimal- i.e., in General, not Time format)
38 minutes in column B would automatically be rounded up to 45 minutes in column C
Does anyone have any ideas? How can I do this using the fewest number of columns?
[A Previously posted question - "Round up to nearest quarter" - introduces the concept of Math.Ceiling. Is this something I should use? I couldn't wrap my head around the answer).
With Grateful Thanks,
~ Jay
How's this go?
DECLARE #time DATETIME = '2014-03-19T09:59:00'
SELECT CASE
WHEN DATEPART(mi, #time) BETWEEN 8 AND 15 THEN DATEADD(mi, 15-DATEPART(mi, #time), #time)
WHEN DATEPART(mi, #time) BETWEEN 23 AND 30 THEN DATEADD(mi, 30-DATEPART(mi, #time), #time)
WHEN DATEPART(mi, #time) BETWEEN 38 AND 45 THEN DATEADD(mi, 45-DATEPART(mi, #time), #time)
WHEN DATEPART(mi, #time) BETWEEN 53 AND 59 THEN DATEADD(mi, 60-DATEPART(mi, #time), #time)
ELSE #time
END
Assume "sessions" is your table (CTE below contains 2 sample records), with session start time & end time stored (as noted in comments above, just store these data points, don't store the calculated values). You might be able to do the rounding as below. (not sure if this is what you want, since it either rounds up or down... do you not want to round down?)
;WITH sessions AS (
SELECT CAST('20140317 12:00' AS DATETIME) AS session_start, CAST('20140317 12:38' AS DATETIME) AS session_end
UNION ALL
SELECT CAST('20140317 12:00' AS DATETIME), CAST('20140317 12:37:59' AS DATETIME) AS session_end
)
SELECT *, DATEDIFF(MINUTE, session_start, session_end) AS session_time
, ROUND(DATEDIFF(MINUTE, session_start, session_end)/15.0, 0) * 15.0 AS bill_time
FROM sessions;
EDIT:
Hi Jay, I don't think you mentioned it is an Excel problem! I was assuming SQL. As Stuart suggested in a comment above, it would be helpful if you modified your question to indicate it is for Excel, so that others can possibly get help from this dialog in the future.
With Excel, you can do it with two columns that contain the session start date and time (column A) and session end date and time (column B), plus two formulas:
Column C (Actual Minutes) = ROUND((B1-A1) * 1440,0)
Column D (Billing Minutes) = (FLOOR(C1/15, 1) * 15) + IF(MOD(C1,15) >= 8, 15, MOD(C1,15))
This is what my table looks like:
3/18/2014 12:00 3/18/2014 12:38 38 45
3/18/2014 14:00 3/18/2014 14:37 37 37
I have a table with three columns in Excel, a,b and c.
One cell has a numeric value X [say 25], I need to get the value in the c column such that X should be in between min and max column. For X=25 the value in c is "20" since X is between the min and max values for the 5th table row.
I'm looking for a range or between kind of function, but couldn't find a function with either name.
a b c
-----------------------------
min max improvements
0 1 70
2 5 60
6 10 50
11 20 30
21 30 20
31 40 10
41 80 5
You want to look up in that table of yours which improvement value is correct if some value is "25"; in this case that would mean to match line 5 of your table and return the value 20.
You are looking for VLOOKUP, e.g.
=VLOOKUP(B12;A2:C8;2)
giving
(edit: fixed stupid typo in formula and image, now giving correct result)