VBA Solver: Find Minimum Value Of Cell By Changing X Cells With Constraints
Mar 18, 2009
I'm trying to use solver to find the minimum value of a cell by changing 5 separate cells. These cells are subject to a set of constraints that are formulae. On top of that I have a large number of these solve's to run (The spreadsheet is creating randomly distributed data to form a Monte Carlo simulation). Therefore I am referencing the formulas using the ActiveCell, Offset() function. For some reason when running this code none of the values are changed. Also I changed the UserFinish to false so I could see what solver was doing at each solve, It stops at the correct cell (one after the final cell) but without me having to confirm it each time.
I have a cell, D5, which is the sum of three other cells, A5 B5 and C5. (all currently empty). Cells A1 through C4 are filled with various numbers.
What I've been trying to do is use solver to say: Make D5 equal 200, do it by manipulating only A5 B5 and C5, and make it subject to the constraint that A5 must equal a value selected from A1:A4, and B5 must equal a value from B1:B4, and C5 ...etc. I have deliberately set it up so that there is only one solution.
I was doing fine until trying to create the constraints. How can I make a constraint that says "this cell" must equal "one of the following cells"? And if I can't do that, is there an alternate method of achieving the same result?
I was able to find a solution using the excel solver add in but unfortunately it cant take more then 200 constraints and hence gives an error. I am unable to find a different approach to this problem.......
I have a maximization problem. I have to maximize Kitchen Sets given available materials. I have 11 different Kitchen Sets and every set requires different material.I have attached an excel spreadsheet for making the problem more clear.
I have T1;T2;T3;T4;M1;M2;M3;M4;O1;O2;O3;O4;Z1;Z2;Z3;Z4 different materials. Every kitchen sets requires one material from T which is fixed (for example T2), one material from M which is fixed again (for example M3), one material from O which is fixed (for example O1) and one material from Z, which is fixed (for example Z4).To complete a set the sum of all materials used should equal to 4. I have some constrains T1+T2+T3+T4<=2 it is the same for M1+M2+M3+M4<=2, O1+O2+O3+O4<=2 and Z1+Z2+Z3+Z4<=2.
So basically my goal is to say which materials should I keep in stock in order to maximize the Kitchen Sets.
I have 50 share returns for 2009 (A2:A51). I am solving for optimal portfolio by allocating weights to my 50 shares in 2009. in solver, i am changing cells B2:B51, but the criteria is that if any of the 2009 returns is greater than 75 then the weight on that share should be 0. i tried to write an if function in column C of the changing cells but solver overrides the command when i solve.
Under Solver, the changing cells box only alllow 200 adjustable cells. I had problem that my adjustable cells is more than 200. Is there anyway I can increase it ? maybe using VB.
Attached is a print screen. I'm struggling with using the min function in vba. I want it to find the minimum cumulative cost in week 0 out of the first three, and the copy the permutations of it (1,0 or 1, 1 , e.t.c.) to Week one column C & D of the model.
I'm trying to change 115 charts so that the Xvalue axes (Y-axes) will start on the lowest value of my data series. This is what I've come up with so far:
[Code] .....
What is the syntax to set instead of X so that all Xvalue axes is set to the lowest Data series value in individual chart?
I have data for 500 companies over 10 years, in three criterions: “EPS”, “DPS” & “PX” (i.e. earnings, dividends and price).
For each company I have four lines recording the data, and given a letter code indicating how the change in dividends and earnings have been according to the following
(Examples) DD-ED = Dividends Decreased & Earnings Decreased ND-EI = No Dividends & Earnings Increased As can be seen below this code is present for each company
What I need help with is some sort of lookup function which takes the average of the price changes (which is given in numerical values) only for the companies which code is equal to the code in the reference field.
So something like: =AVERAGE(IF((MOD(ROW(D2:D2353)-ROW(D2)+1,5))=0,IF(D2:D2353"",D2:D2353))) (currently counting every 5th line, since there is 4 lines between respectively PX/DPS/EPS for each company) –But with a constraint indicating only to include the value in the calculation if the codes are the same (e.g. "DI-EI" = "DI-EI").
So that the value, which is currently 20.96% (which now includes ALL price values), would only include those for the respective group (in this case, companies in the DE-EI group).
I have a proyect evaluation. I use solver to find a value, which works. I recorded a macro for this situation (which repeats all the time), but when I run it, it does not work. The problem is not the answer, it is that the macro does not run
Sub TIR() SolverOk SetCell:="$M$41", MaxMinVal:=1, ValueOf:="0", ByChange:="$C$44" SolverSolve Range("E44").Select End Sub
If i have a range say E12:O12 and want to find the last cell before blank, lets say it finds m12 as the cell with the value before blank. then with m12 it needs to determine weather row 11 in the same column has Text either "S" or "F" if "S" then m12 = t if "F" then m12 offset(1,-1) = t. And just to make things more difficult i need the range E12:O12 to step 2 as well until it gets to E208:O208 .Noting that row 11 never changes and will always have either an "S" Or an "F"
I want to use solver program. But when solver "changes cells" i want it to trigger my pivot tables in the workbook. So i added the code to my worksheet:
Private Sub Worksheet_Change(ByVal Target As Range)
ThisWorkbook.RefreshAll
End Sub
So when a change occurs, all my pivot tables will get refreshed and my data will change. Is solver able to trigger this event while solving an optimization problem?
I am having trouble with large data sets of rents by market: trying to find the peak rent in a time-series, and then look for the next trough rent in time. I tried using the Newsletter 3 techniques which feels like the right direction, but I am not getting the nesting right or some of the parameters in the functions.
So, within each time-series I need to find the MAX value (peak rent), wherever that is in the array. Then I need to look to the right of that exact MAX value and find the exact MIN value (trough rent), whereever that is in the array (again, to the right of the MAX value).
I have been trying to solve this problem for the past couple of weeks and I have not been able to do so. I have come to do the operation manually, and it really takes a lot of my time, so if you guys could help me, I would really appreciate it.
Basically the problem is this:
In column "A" I have what I call point numbers for all the data entries.
In column "B" I have the station (or location) at which I vary slightly a parameter (represented by column "E") to give me a value shown in column "D" (the "Z" value, as shown in the sheet).
So basically you can see that my station 0 has 11 different "E" parameters (0, -1, -2.62, -5, etc) and each of them has a "Z" parameter (390.76, 390.775, etc).
What I am trying to do is to come up with a table that shows a summary of the following:
A column with each of the stations (0, 20, 40, etc -- notice that I have some weird numbered stations like 411.89).
Another column with the "E" parameter corresponding to the lowest (or minimum) "Z" parameter within the station range.
And a final column with the minimum "Z" parameter corresponding to its "E" parameter, which is included in the station range
You can see in yellow the way I have been doing this and you can see that it would take me so much time to accomplish the task.
I have following problem I have some table - 2 columns - in first is text in second is value.
example: A 10 B 5 C 3 A 15 C 8 D 7 A 9
I need to use formula, which shows me minimal value for choosen text. I tried matrix formula like {=min(if(text table=choosen text; second column;0}, but it's not working
If I have a range of data say all numeric and range form cells A1:A20. How would I find the minimum value except A4 where A4>0?
I know I can use the 'MIN' function and highlight all the data bar A4 (min(A1:A3,A5:A20) but i was hoping for an actual way so I could later fix the column such that first A1 is the first to be omitted A2 is the second and so on.
Look in Column A and find the cell that contains "Std A 1" and the cell that contains "Std A 2".
Compare the corresponding values in Column B, and multiply the lowest value by .2 I've tried using various methods (find, if cell.value.instr) but I keep getting errors. Can anyone point me in the right direction?
I have inherited some legacy templates (Standard, Leave and Exception) which cannot be changed. I need to summarise them (Total) selecting the earliest start and the latest finish. (Sample attached). The templates are 90 columns wide and about fifty lines deep so named ranges isn't practicle (I think). I'm running 2003.
I am trying, without success, to create a formula that will refer to a column of data and do the following in one step:
1. Find the minimum value in the range, and then 2. From that minimum value, count back “up” the column the number of occurrences, including the minimum value, until a zero is reached. The zero should not be counted.
For example, if the values in A1:A6 are 1, 0, 2, -1, -2, 1, the minimum value is -2 and the count would return 3. (i.e. 2, -1 and -2)
How do I find the minimum and maximum numbers in a table if I do not know the size of the table but can assume the user will choose the first cell (upper left cell) of the table and run the macro?
So i need a way to find the minimum number in a given set of numbers without there being multiple minimums. For example if you had 1,2,3,4,5,6,7 the minimum would be 1. If however you had 1, 1, 2, 3, 4, 5....i want excel to recognize there are multiple minimums (two 1's) and produce a warning (i realize this probably needs to be coupled with an if statement).
I'm looking for a formula to find the minimum value in a non successive range of numbers (excluding zero values).
My sheet contains four fields of numbers (#1, #2, #3 and #4) and than start over again with number #1, #2, #3 and #4 etc. This goes on for approx. 25 4-column blocks. A simple MIN-formula or SMALL-formula doesn't seem to do the trick as it takes all values into account, not just the #1 or #2 or #3 or #4 values.
Example (cells A1..A24): 999-999-999-999-110-120-130-140-111-121-131-141-112-122-132-142-0-0-0-0-113-123-133-143
The minimum value of #1 (excluding the zero's) would be 110, the minimum value of #2 would be 120, #3 would be 130 and #4 would be 140.
