In the past here at Chandoo.org and at many many other sites, people have asked the question “How can I display a number Multiplied or Divided by 10, 100, 1000, 1000000 etc, but still have the cell maintain the original number for use in subsequent calculations“.
Typically the answer has been limited to “It can’t be done” or “It can only be done in multiples of 1000”.
Well thanks to a tip I picked up from Kyle who responded to a post here at Chandoo.org they are all wrong.
It is possible to Multiply or Divide any cell contents by any power of 10 using Custom Number Formats !
That is:
How does this work:
When using custom number format we have two possibilities to modify the display number
- Use a Comma to divide by 1000; or
- Use a % to Multiply by 100
So using a combination of these any power of 10 can be obtained.
So using the correct combination of , and % can result in any power of 10 multiplier we require.
The problem is that using a % adds a % to the number!
The trick which Kyle added is that adding a Ctrl J to the Custom Number format allows us to hide the % signs on a second row of text, then by adjusting the cell to have word wrap and adjusting the row height the second row is not visible.
The Ctrl J must be added after the ,’s and before the %’s
So using the examples above the table is:
The Ctrl J adds a Carriage Return, chr(10), to the Format String.
Finally after applying the Custom Number Format the Cell must be edited to enable Word Wrap.
Select the Cells with the custom Formats, Ctrl 1, Alignment
You can see the hidden % symbols if you increase the Row Height.
Combination with Regular Custom Formats
These Custom Number Formats can of course still be combined with regular Custom Number Formats, just make sure that the Ctrl J is inserted before the % signs:
No Loss of the Cells Value
It is also worth noting that the original number is still maintained internally in the cell and that cells dependent on the cells don’t have to adjust for the display value.
Multi Line Formats
By extension we can now use this technique to add multiple Lines of Text to a Custom Number Format
Downloads
You can download a file containing all the above example here: Download Here
Other Links to Custom Number Formats
Here:
http://chandoo.org/wp/2008/02/25/custom-cell-formatting-in-excel-few-tips-tricks/
http://chandoo.org/wp/2011/11/02/a-technique-to-quickly-develop-custom-number-formats/
http://chandoo.org/wp/2011/08/19/selective-chart-axis-formating/
http://chandoo.org/wp/2011/08/22/custom-chart-axis-formating-part-2/
http://chandoo.org/wp/tag/custom-cell-formatting/
Elsewhere
http://www.ozgrid.com/Excel/CustomFormats.htm
http://peltiertech.com/Excel/NumberFormats.html
Thanx
Just a quick final Thank You to Kyle for highlighting this Custom Number Format feature/trick last week
I look forward to your comments below:
19 Responses to “How to Distribute Players Between Teams – Evenly”
An excellent solution, especially for large data sets.
Another solution without using solver would be to assign the player with the highest score to Team 1, the 2nd to team 2, 3rd to team 3, 4th to team 3, 5th to team 2, 6th to team 1, 7th to team 1 and it continues. This method would end up with a Std Dev of 0.001247219. This works best with a distribution with lower Std Dev for the dataset.
Full Disclosure: this is not my idea, remember reading something a few years ago. Think it may have been Ozgrid
thinking back I now remember why I read about it. About 10 years back I had to distribute around 300 team members into 25-30 odd teams. Used this method based on their performance scores. I used the method I described to do this and the distribution was pretty fair.
Solver would have saved me a ton of time though 🙂
I think the issue with you first Solver approach was that you took the absolute value of the sum of team deviations (which should always be zero except for rounding) instead of the sum of the absolute values (which is a reasonable measure of how unbalanced the teams are).
Here's another simple algorithm you could use: you start from the top (with players sorted from high to low), and at each step allocate the next player to whichever team has the smallest total so far. You can implement it dynamically with some formulas so it will update automatically when the data changes.
If the scores were more widely distributed (so that this might end up with not all teams the same size), you could add a constraint to only pick among the teams which currently have fewest players at each step, or just stop adding to any team when it hits its quota.
When I tried it on the sample, I got the three teams below, with a STDEV of 0.000942809 (i.e. about half of what Solver got to).
Team 1: John, Hugo, Tom, Josh, Eric, Zane, Charles, Andrew
Team 2: Barry, Michael, Kenny, Joe, Xavier, Patrick, Oliver, William
Team 3: Henry, Steven, Ben, Frank, Kyle, Edward, Cameron, Lachlan
Thanks for sharing!
Hi,
I was looking at all the solutions and this is closest to what I intended to do. I am dividing a bunch of players into 3 soccer teams. Players availability is also a factor while deciding the teams.
So the steps the excel needs to do is as follows:
1) In availability column if "yes" go to next
2) Equally divide 'Goalkeepers', 'Strikers', 'Defenders' basis their quality
So the end result gives each 3 teams a balance of players playing at different positions.
Can this be done on Google spreadsheet with only availability as an input from the user and rest calculates by itself.
Sorry for asking such a pointed question, but I have been struggling to find a solution for it for sometime now!
Hi Ishaan,
I am working on a similar problem at the moment, so I am wondering if you ever found a solution and if you are willing to share what you did.
Hi everyone, this is a variation of the famous Knapsack Problem https://en.wikipedia.org/wiki/Knapsack_problem.
I had to use a VBA implementation recently as part of a problem, where we ar trying to allocate teams of an organization into different locations (we are a large company with many different team). The goal was to optimally allocate teams to individual buildings without putting too many teams into one building and not splitting teams apart.
As we had around 400 teams of different sizes, solver couldn't handle it anymore. Luckily there is a Knapsack algorithm implementation in VBA readily available on the internet :).
I also went with a heuristic approach first!
An interesting mathematical solution but what if Eric and Xavier can't stand each other or Patrick is best friends with Steven - the real life problems that effect "even" teams.
@Joe
You can add more criteria like
If Eric and Xavier can't stand each other
=OR(AND(E15=1,E16=1),AND(F15=1,F16=1),AND(G15=1,G16=1))
It must be False
If Patrick is best friends with Steven
=OR(AND(E5=1,E17=1),AND(F5=1,F17=1),AND(G5=1,G17=1))
It must be True
Note that the 2 formulas above are exactly the same
except for the ranges
One must be True = Friends
One must be False = Not Friends
Nice Post!
Just one question What if number of players are not even or equally divisible.
Nice post Hui!
I download your workbook and just try to change in options the Precision Restriction from 10E-6 to 10-8 and the Convergence from 10E-4 to 10E-10. The process take almost the same time, but the results was great.
The standard deviation I got was 0,000471.
Team 1: John, Tom, Kenny, Frank, Eric, Xavier, Edward, Zane
Team 2: Steven, Hugo, Ben, Joe, Josh, Oliver, Cameron, William
Team 3: Barry, Henry, Michael, Kyle, Patrick, Charles, Andrew, Lachlan
Great application of Solver! Thanks for the link!
Great explanation. Well done... However, I tried with 6 teams of 4 players and solver never did finish.
How about vba code for the same data set.
I have 3 column A B C wherein A has text and B has number Wherein C is blank. And in C1 been the header C2 where I want the name to come evenly distributed the number which is in Column B.
My Lastcolumn is 1000.
Sorry if I'm being slow here, but how is 'Team Score' calculated? I've gone through the explanation several times but it seems to just appear.
@Hrmft
This process uses the Solver Excel addin
Solver is effectively taking the model and trying different solutions until it gets a solution that meets all the criteria
Then solver puts the solution into the cell and moves to the next cell
So yes it appears to "just appear"
Hi ! Thank you so much ! Works great 🙂
I cannot get the fourth Equation to work in my excel spreadsheet
You have =($E$2:$G$25=0)+($E$2:$G$25=1)=1 as a SUMIF solution, I have, =($F$2:$H$13=0)+($F$2:$H$13=1)=1 as my solution but it does not work. The only thing I changed is the ranges. Any suggestions?
Thank you.
Jim
I cannot get the fourth Equation of TURE or FALSE statements to work in my excel spreadsheet You have =($E$2:$G$25=0)+($E$2:$G$25=1)=1 as a SUMIF solution, I have, =($F$2:$H$13=0)+($F$2:$H$13=1)=1 as my solution but it does not work. The only thing I changed is the ranges. Any suggestions?
Sorry I left some of it out in the previous question,
Thank you. Jim