NOTE: I don't need a solution for the actual problem to be solved with Excel. I want to understand and discuss the behaviour. And I want to see, if other people can reproduce the situation and make them aware of it.
Situation is extremely simplified for debugging the problem.
I use Excel 2007 in an cooperate environment
In a calculation made on a two-week basis, I have to fill in numbers for the two-week interval that are valid a whole month. For example first two weeks of December I have to use value 12, second two weeks again, than first to weeks of January I have to use 1, second two weeks again.
Therefore I have a column for each two-week period with a field of current month (green area in screenshot). The values valid for the month are in a second table (red area). To retrieve the value for current period, I use a LOOKUP()call:
(A2): =LOOKUP(A1;$A$9:$H$9;$A$10:$H$10)
...
(P2): =LOOKUP(P1;$A$9:$H$9;$A$10:$H$10)
As you can see in the screenshot, the function goes havoc and retrieves false values.
For testing, I reproduced the situation with the international phonetic alphabet instead of month names. Therefore:
(A5): =LOOKUP(A4;$A$12:$H$12;$A$13:$H$13)
...
This time, the function works well. Therefore I guess, it has something to do with the name of months. Maybe they have some internal representation, despite the fact, the cell are formatted as "text".
I already tested vertical vectors instead of horizontals in the red area. They lead to the same situation.
NOTE:
I finally solved the original problem by using HLOOKUP() and VLOOKUP(). There I found another clue. Both show the same behaviour if [not_exact_match] is committed or set to true but work fine, if exact_match is enforced. So, how can Februar be an approximate match to Dezember?
See http://office.microsoft.com/en-gb/excel-help/lookup-function-HP010342671.aspx
For the LOOKUP function to work correctly, the data being looked up must be sorted in ascending order.
This is not the case with the texts "Dezember", "Januar", "Februar", ...
If you would use real dates 01.12.2013, 01.01.2014, 01.02.2014, ... and format them as "MMMM", then it should work. Of course the lookup_value also has to be in that form.
Same problem with VLOOKUP and not exact match. http://office.microsoft.com/en-gb/excel-help/vlookup-function-HP010343011.aspx
If range_lookup is either TRUE or is omitted, the values in the first column of table_array must be placed in ascending sort order; otherwise, VLOOKUP might not return the correct value.
Related
I am trying to use the Match function to return the row of an indicated table that a certain time value is on. The time is in mm:ss format on the table, so I want users to input the desired time to match as text for their simplicity (with data validation to ensure its correct format), and then use the Time function within the Match function to convert the input to match the format of the table for comparison. However, when using the Time function, the Match function returns the incorrect row, one row number short of what it should be to be precise. I attempted to do some debugging (shown below) and looked into the documentation of both the Time and Match functions, but can't figure out why this would happen. Is there something about the Time function I'm missing?
Here is a breakdown of what I'm using and what I've done to debug and figure out it's the Time function that's causing me issues. Column R has the functions I've been using and their results, and Column S has direct links to the table to show what the output should be. Column T shows that the time values are exactly the same but that using them yields different results in the Match function. Column U is the user input time in text format, and columns V through X are just used to ensure we get to the correct column in the lookup table.
(https://i.stack.imgur.com/ageCW.png)
Here is a snip of the table being referenced in the Match function.
(https://i.stack.imgur.com/FgfGG.png)
Well, this is curious. This is NOT a proper answer, but I needed to enter this as an answer rather than a comment because I needed the space and the markup of a table. I created my own table and ran my own experiment.
I entered the time value of 00:01:23 three different ways:
I typed "00:01:23" into a cell manually.
I entered =TIME(0,1,23) in a cell
I typed "00:01:15" and "00:01:16" into two consecutive cells, and then dragged it down and let Excel autofill.
Here's the results I got:
How Entered
Value
Typed "00:01:23" in Excel
0.0009606481481481480000
=TIME(0,1,23)
0.0009606481481481480000
Fill
0.0009606481481481490000
I emphasized the digit that turned out unexpectedly different.
I then did a MATCH(x,x,1) down this column for each value and it resulted in exactly the behavior you observed. The first two matched 1:22, as they should, because they were ever so slightly less than the table value. The self-referencing MATCH() of the 1:23 cell correctly matched on 1:23.
What is puzzling to me is that my test revealed to me that the value in the lookup table was a tiny bit off, by (0.0000000000000000010000), where your test presented the exact same number, concealing the difference. So in my test, the MATCH() behaved correctly for the data given, even if the data was wrong.
Excel is limited to 15 significant digits, and I have no way of knowing what rounding shenanigans Excel goes through to drop the remaining digits.
My thought goes to wondering how the time values in your lookup table were first created to begin with. Like, were they initially entered in a google sheet and then opened in excel? Is the 15 significant digit rounding handled identically among excel versions and OSes?
Working in Excel 2019. In the same realm as one of my previous questions, I'm working with a database that I'm trying to look through via functions to get my values. The VLOOKUP tool worked well for going through the time-table to find the value I need, but it's not working when I'm trying to find RPM as the look-up value. Here's the gist of the data.
We have Time(sec, A:A in "PPT_156Data" sheet), RPM (B:B in same sheet), and Pressure (Bar, C:C in same sheet).
From the graph, you can see that we ramp to 8000RPM over the course of around 60 seconds, and then ramp down to 0RPM over the next 30. Test times WILL vary and rates WILL vary from pump-to-pump, as each one will give different data values based on the pump. That's why, say, 1000RPM will not be in the same spot every time.
I'm trying to find the RPM at 1000 intervals up to 8000 and report out the pressure at said intervals.
Here's what I tried so far, with imagery as well.
'Disregard if you see W25 for S25, I had just been trying multiple things
First, I attempted the same VLOOKUP code I had done for the time-table prior
=VLOOKUP(S25,PPT156_Data!B:C,2,TRUE) 'S25 being lookup value
This worked fine, UP UNTIL it hit a particular spot. For some reason, as soon as it tries to find an approximate match for 6663RPM, it faults out and gives incorrect data. From then on, all the way to 8000RPM, it will ONLY give the result of 0.139BAR. I have no clue why. Trying to find that value in the return array gives multiple results, but it's not like it's the ONLY value left.
So, I tried to do a wildcard for it with the following code
=VLOOKUP("*"&S25&"*",PPT156_Data!B:C,2,FALSE) 'Attempted both False and True states
Gave N/A for both of the values. Not sure if I'm entering in the wildcard incorrectly here. The decimal places that the RPM can go to ranges between 2-5 (hundredths to hundred-thousandths, IE 7000.00750)
I then thought maybe an Index Match would work.
=INDEX(PPT156_Data!B:C,MATCH(S25,PPT156_Data!B:B,-1),2)
Tried that in wildcard format too, returned nothing. So, I decided to see if I could even match a value for RPM with the following attempts
=MATCH(S25,PPT_Data156!B:B,-1)
This gave nothing. HOWEVER, when setting the match specification to 1, it gives the very last row in the data set. So, I decided to find a value in column B, and attempt to match with it exactly.
=MATCH(7000.07,PPT_Data156!B:B,0)
This also returned nothing. Even though, you can see in my images, that the value is ABSOLUTELY there. SIGFIG shows it's 7000.1 but trust me, it's 7000.07. So that sort of threw me for a loop. Figuring maybe there was a different error and grasping at straws, tried another Index Match formula, this time subtracting the lookup value in an attempt to get it extremely close and absolute value/min it
=INDEX(PPT156_Data!C:C,MATCH(MIN(ABS(PPT156_Data!B:B-S25)),ABS(PPT156_Data!B:B-S25),1))
I'm at a loss. I'm not sure if because the rate ramps up and down, thus not being in ascending order, is causing a problem? I can't change that. I am thinking I may need to create a macro for this in some way? Maybe a helper table? But I can't even FIND the match value to create a helper table. Any help at all would be VERY appreciative.
Thank you for your time looking at my post.
I am presuming that you want the first pressure reading when the RPM hits above each 1000 interval. I got to a solution but feels a bit complex.
=index(C:C,1/max(iferror(1/(row(B:B)*(B:B>E12)),Null)))
Breaking this down, we create a boolean array where the RPM hits above the interval
=B:B>E12
and then we multiple this by the array of the rows of column B
row(B:B)*(B:B>E12)
which gives us an array of the row numbers when the RPM is above E12 but also zero for all the ones that do not.
=iferror(1/(row(B:B)*(B:B>E12)),Null)
We then force an error with the zeros by dividing and replace with null. We get the max since we inverse the row numbers and then inverse again to get the row number back.
=index(C:C,1/max(iferror(1/(row(B:B)*(B:B>E12)),Null)))
[Excel working screenshot][1]
[1]: https://i.stack.imgur.com/uhcaX.png
I am not familiar with excel as you can probaly guess by my question so I am sorry if it's a silly question but I have been googling for a long time and I can't do it.
I manage to do it in excel 365 with the function filter, but I can't on excel 2019 (I am required to do it in excel 2019)
I want to identifed the smaller number of a specific combination of cells using two table.
Table1 has name of people and places as well as a number. (the number shows the difference of the last time a person went to a place and the [in months])
(In this project the inspector cannot go to the same place twice unless 4 months have pass, thus why I want the smaller number, using the date of the last visited and the fcuntion now I get teh number of months that have pass)
Table2 has only the name of one person out of these people but has the name of all places. I want to get the smaller number for every place.
This is my table1: (I hided other peoples names so I can show a more compact examlplo)
And this is my table2:
I thought that I could use a function aggregate with a function if inside of it to get only the values that I desire.
It did not worked thou. Was I had miss undertand the fact that function if only gives me true or false. But thought that the aggregate function could wordk. It did not as well
=AGGREGATE(5;3;A2&B2=Table1[#Place]&Table1[#name];1).
overall my question could be summarize to which funtion should I used?
Which function should I use?
obs: In excel 365 I used concat to make a code an thus only used one cell, but I don't see why it wouldn't work if I just select two cells insted of one (teh concat cell)
I'm trying to put together a company excel sheet to keep track of the tickets we give out to senior sales to take out clients.
I put together a "Soonest Available Ticket" section to easily ID what games are coming up we still have tickets for. However, we don't give out tickets to every game and so I want to have these formulas return dates only of games that have not happened yet. Right now, they simply return the first unclaimed game which are all in the past.
I've tinkered with a few formulas, but I can't figure out how to only command it to look at dates today or later. Any ideas?
Below, in order, are my original Index formula, and then my attempts to only find upcoming games.
=IFERROR(INDEX(CubsDate,MATCH("Avail*",CubsTicketStatus,0),1),"Filled")
=IF(WhiteSoxDate>NOW(),IFERROR(INDEX(WhiteSoxDate,MATCH("Avail*",WhiteSoxTicketStatus,0),1),"Filled"),"Season Ended")
=IF(WhiteSoxDate>NOW(),INDEX(WhiteSoxDate,MATCH("Avail*",WhiteSoxTicketStatus,0),1),"Season Ended")
{=INDEX(WhiteSoxDate,(MATCH("Av*"&"*">TODAY(),WhiteSoxTicketStatus&WhiteSoxDate,0)))}
Assuming that "CubsDate" and "CubsTicketStatus" are named ranges of cells (the former containing dates and the latter the status, either "Avail" or "Filled"), then perhaps this will do what you want:
{=INDEX(CubsDate,MATCH(1,(CubsTicketStatus="Avail")*(CubsDate>TODAY()),0))}
Note that if there is no matching date after the current date, you'll get an #N/A result (which you could easily test for).
Here's a test I ran:
Note that the data here is in rows 25 - 31. Also, you'll need to format the result as a date.
Hope this helps!
Edit: Here's an explanation of how the Match function is being used. (I edited the answer so that future generations will find it more easily than if I added a comment.)
As a reminder (because I'm old and forgetful), the Match function takes three parms: Lookup Value, Lookup Array, and Match Type. So in
MATCH(1,(CubsTicketStatus="Avail")*(CubsDate>TODAY()),0)
we're looking for a value of 1 with a match type of 0 (exact match). That's the easy part. Our Lookup Array, however, is a little more complex. It consists of two tests multiplied by each other. So in each row, it looks at the value in CubsTicketStatus to see if it is "Avail" and it looks at the value in CubsDate to see if it's after today.
Each of those tests results in either TRUE or FALSE but, when you put them in the context of a mathematical calculation, they are 1 and 0. So if they're both TRUE, then you get 1 * 1, but if either (or both) is FALSE, you get zero. The Match function then returns the first row where both are TRUE -- that is, the first row where tickets are "Avail" and the date is after TODAY().
I have 5 columns of data with around 50,000 rows. This is the ambulance response times to an incident. I am trying to figure out the total number of incidents as multiple ambulances respond to a single incident. The 'IF' function has been useful upto a certain extent where the multiple ambulances reached at the same time but when it is not at the same time, it considers it as a different incident. I would like to add a buffer of 20 minutes but I am not able to figure out how to incorporate that. The second problem is with the incident number. The incidents 2014-014374-006, 2014-014374-009 are the same, just the ending numbers are different. How do I differentiate? Can I do it in excel or other platforms?
http://imgur.com/a/30VHl
To return the incident number, use a formula like this: "=IF(ISERROR(SEARCH("-",D5,SEARCH("-",D5)+1)),D5,LEFT(D5,SEARCH("-",D5,SEARCH("-",D5)+1)-1))" where D5 is the cell with your incident number.
What this formula does is it first creates an if statement that will allow you to determine if the incident has the second dash or if it doesnt. If it doesn't, then it will return the value in the cell. If it does, it will return the text to the left of that dash. The search function looks for a substring, and by nesting a search and adding "1" to the value of the first search, we are looking for the substring that comes after the first one is found.
It is a rather confusing formula the first time you use it, but it works like a charm once you understand it.
I will see if I can figure the dates out. That might be more difficult. If you can simply use the incident number for this, you will likely have an easier time.