I have a worksheet that calculates various values based on a random value and would like to use the law of large numbers to converge to an average for each calculation.
I am thinking of using VBA to execute the calculation 1000's of times and store the values in a list for averaging at the end. My current testing code only stores the original value after each iteration. ie Safety1 does not change even though the value in R36 changes.
Dim Safety1(0 To 10) As Long
For i = 0 To 10
Safety1(i) = Sheet34.Range("R36").Value
Debug.Print Safety1(i)
Next i
myAverage = Application.WorksheetFunction.Average(Safety1)
myAverage should be the converging average.
R36 contains the sum of other ranges, which contain values based on rand()
If there is a better way to do this, i am happy to listen.
Thanks in advance.
This post resolved the problem. I needed to wait until the calculation process had completed before storing the value
Please do sheet calculate like this:
Dim Safety1(0 To 10) As Long
Application.ScreenUpdating = False
For i = 0 To 10
Worksheets("Sheet34").Calculate
Safety1(i) = Sheet34.Range("R36").Value
Debug.Print Safety1(i)
Next i
Application.ScreenUpdating = True
myAverage = Application.WorksheetFunction.Average(Safety1)
I want to do an INDEX-MATCH-like lookup between two documents, except my MATCH's index array doesn't stay in one column.
In Vague-English: I want a value from a known column that matches another value that may be found in any column.
Refer to the image below. Let's call everything to the left of the bold vertical line on column H doc1, and the right side will be doc2.
Doc2 has a column "Find This", which will be the INDEX's array. It is compared with "ID1" from doc1 (Note that the values in "Find This" will not be in the same order as column ID1, but it's easier to undertsand this way).
The "[Result]" column in doc2 will be the value from doc1's "Want This" column from the row that matches "FIND THIS" ...However, sometimes the value from "FIND THIS" is not in the "ID1" column, and is instead in "ID2","ID3", etc.
So, I'm trying to generate Col K from Col J. This would be like pressing Ctrl+F and searching for a value in Col J, then taking the value from Col D in that row and copying it to Col K.
I made identical values from a column the same color in the other doc to make it easier to visualize where they are coming from.
Note also that in column F of doc1, the same value from doc2's "Find This" can be found after some other text.
Also note that the column headers are only there as examples, the ID columns are not actually numbered.
I would simply hard-code the correct column to search from, but I'm not in control of doc1, and I'm worried that future versions may have new "ID" columns, with other's being removed.
I'd prefer this to be a solution in the form of a formula, but VB will do.
To generate column K based on given values of column J then you could use the following:
=INDEX(doc1!$D$2:$D$14,SUMPRODUCT((doc1!$B$2:$H$14=J2)*ROW(doc1!$B$2:$H$14))-1)
Copy that formula down as far as you need to go.
It basically only returns the row of the where a matching column J is found. we then find that row in the index of your D range to get your value in K.
Proof of concept:
UPDATE:
If you are working with non unique entities n column J. That is the value on its own can be found in multiple rows and columns. Consider using the following to return the Last row where there J value is found:
=INDEX(doc1!$D$2:$D$14,AGGREGATE(14,6,(doc1!$B$2:$H$14=J2)*ROW(doc1!$B$2:$H$14),1)-1)
UPDATE 2:
And to return the first row where what you are looking in column J is found use:
=INDEX($D$2:$D$14,AGGREGATE(15,6,1/($B$2:$H$14=J2)*ROW($B$2:$H$14)-1,1))
Thanks to Scott Craner for the hint on the minimum formula.
To determine if you have UNIQUE data from column J in your range B2:H14 you can enter this array formula. In order to enter an array formula you need to press CTRL+SHFT+ENTER at the same time and not just ENTER. You will know you have done it right when you see {} around your formula in the formula bar. You cannot at the {} manually.
=IF(MAX(COUNTIF($B$2:$H$14,J2:J14))>1,"DUPLICATES","UNIQUE")
UPDATE 3
AGGREGATE - A relatively new function to me but goes back to Excel 2010. Aggregate is 19 functions rolled into 1. It would be nice if they all worked the same way but they do not. I think it is functions numbered 14 and up that will perform the same way an array formula or a CSE formula if you prefer. The nice thing is you do not need to use CSE when entering or editing them. SUMPRODUCT is another example of a regular formula that performs array formula calculations.
The meat of this explanation I believe is what is happening inside of the AGGREGATE brackets. If you click on the link you will get an idea of what the first two arguments are. The first defines which function you are using, and the second tell AGGREGATE how to deal with Errors, hidden rows, and some other nested functions. That is the relatively easy part. What I believe you want to know is what is happening with this:
(doc1!$B$2:$H$14=J2)*ROW(doc1!$B$2:$H$14)
For illustrative purpose lets reduce this formula to something a little smaller in scale that does the same thing. I'll avoid starting in A1 as that can make life a little easier when counting since it the 1st row and first column. So by placing the example range outside of it you can see some more special considerations potentially.
What I want to know is what row each of the items list in Column C occurs in column B
| B | C
3 | DOG | PLATYPUS
4 | CAT | DOG
5 | PLATYPUS |
The full formula for our mini example would be:
{=($B$3:$B$5=C2)*ROW($B$3:$B$5)}
And we are going to look at the following as an array
=INDEX($B$3:$B$5,AGGREGATE(14,6,($B$3:$B$5=C2)*ROW($B$3:$B$5),1)-2)
So the first brackets is going to be a Boolean array as you noted. Every cell that is TRUE will TRUE until its forced into a math calculation. When that happens, True becomes 1 and False becomes 0.I that formula was entered as a CSE formula and place in D2, it would break down as follows:
FALSE X 3
FALSE X 4
TRUE X 5
The 3, 4 and 5 come from ROW() returning the value of the row number that it is dealing with at the time of the array math operation. Little trick, we could have had ROW(1:3). Just need to make sure the size of the array matches! This is not matrix math is just straight across multiplication. And since the Boolean is now experiencing a math operation we are now looking at:
0 X 3 = 0
0 X 4 = 0
1 X 5 = 5
So the array of {0,0,5} gets handed back to the aggregate for more processing. The important thing to note here is that it contains ONLY 0 and the individual row numbers where we had a match. So with the first aggregate formula, formula 14 was chosen which is the LARGE function. And we also told it to ignore errors, which in this particular case does not matter. So after providing the array to the aggregate function, there was a ,1) to finish off the aggregate function. The 1 tells the aggregate function that we want the 1st larges number when the array is sorted from smallest to largest. If that number was 2 it would be the 2nd largest number and so on. So the last row or the only row that something is found on is returned. So in our small example it would be 5.
But wait that 5 was buried inside another function called Index. and in our small example that INDEX formula would be:
=INDEX($B$3:$B$5,AGGREGATE(...)-2)
Well we know that the range is only 3 rows long, so asking for the 5th row, would have excel smacking you up side the head with an error because your index number is out of range. So in comes the header row correction of -1 in the original formula or -2 for the small example and what we really see for the small example is:
=INDEX($B$3:$B$5,5-2)
=INDEX($B$3:$B$5,3)
and here is a weird bit of info, That last one does not become PLATYPUS...it becomes the cell reference to =B5 which pulls PLATYPUS. But that little nuance is a story for another time.
Now in the comments Scott essentially told me to invert for the error to get the first row. And this is important step for the aggregate and it had me running in circles for awhile. So the full equation for the first row option in our mini example is
=INDEX($B$3:$B$5,AGGREGATE(15,6,1/($B$3:$B$5=C2)*ROW($B$3:$B$5),1)-2)
And what Scott Craner was actually suggesting which Skips one math step is:
=INDEX($B$3:$B$5,AGGREGATE(15,6,ROW($B$3:$B$5)/($B$3:$B$5=C2),1)-2)
However since I only realized this after writing this all up the explanation will continue with the first of these two equations
So the important thing to note here is the change from function 14 to function 15 which is SMALL. Think of it a finding the minimum. And this time that 6 plays a huge factor along with the 1/. So our array in the middle this time equates to:
1/FALSE X 3
1/FALSE X 4
1/TRUE X 5
Which then becomes:
1/0 X 3
1/0 X 4
1/1 X 5
Which then has excel slapping you up side the head again because you are trying to divide by 0:
#div/0 X 3
#div/0 X 4
1/1 X 5
But you were smart and you protected yourself from that slap upside the head when you told AGGREGATE to ignore error when you used 6 as the second argument/reference! Therefore what is above becomes:
{5}
Since we are performing a SMALL, and we passed ,1) as the closing part of the AGGREGATE, we have essentially said give me the minimum row number or the 1st smallest number of the resulting array when sorted in ascending order.
The rest plays out the same as it did for the LARGE AGGREGATE method. The pitfall I fell into originally is I did not use the 1/ to force an error. As a result, every time I tried getting the SMALL of the array I was getting 0 from all the false results.
SUMPRODUCT works in a very similar fashion, but only works when your result array in the middle only returns 1 non zero answer. The reason being is the last step of the SUMPRODUCT function is to all the individual elements of the resulting array. So if you only have 1 non zero, you get that non zero number. If you had two rows that matched for instance 12 and 31, then the SUMPRODUCT method would return 43 which is not any of the row numbers you wanted, where as aggregate large would have told you 31 and aggregate small would have told you 12.
Something like this maybe, starting in K2 and copied down:
=IFERROR(INDEX(D:D,MAX(IFERROR(MATCH(J2,B:B,0),-1),IFERROR(MATCH(J2,E:E,0),-1),IFERROR(MATCH(J2,G:G,0),-1),IFERROR(MATCH(J2,H:H,0),-1))),"")
If you want to keep the positions of the columns for the Match variable, consider creating generic range names for each column you want to check, like "Col1", "Col2", "Col3". Create a few more range names than you think you will need and reference them to =$B:$B, =$E:$E etc. Plug all range names into Match functions inside the Max() statement as above.
When columns are added or removed from the table, adjust the range name definitions to the columns you want to check.
For example, if you set up the formula with five Matches inside the Max(), and the table changes so you only want to check three columns, point three of the range names to the same column. The Max() will only return one result and one lookup, even if the same column is matched several times.
I came up with a vba solution if I understood correctly:
Sub DisplayActiveRange()
Dim sheetToSearch As Worksheet
Set sheetToSearch = Sheet2
Dim sheetToOutput As Worksheet
Set sheetToOutput = Sheet1
Dim search As Range
Dim output As Range
Dim searchCol As String
searchCol = "J"
Dim outputCol As String
outputCol = "K"
Dim valueCol As String
valueCol = "D"
Dim r As Range
Dim currentRow As Integer
currentRow = 1
Dim maxRow As Integer
maxRow = sheetToOutput.UsedRange.Rows.Count
For currentRow = 1 To maxRow
Set search = Range("J" & currentRow)
For Each r In sheetToSearch.UsedRange
If r.Value <> "" Then
If r.Value = search.Value Then
Set output = sheetToOutput.Range(outputCol & currentRow)
output.Value = sheetToSearch.Range(valueCol & currentRow).Value
currentRow = currentRow + 1
Set search = sheetToOutput.Range(searchCol & currentRow)
End If
End If
Next
Next currentRow
End Sub
There might be better ways of doing it, but this will give you what you want. We assume headers in both "source" and "destination" sheets. You will need to adapt the "Const" declarations according to how your sheets are named. Press Control & G in Excel to bring up the VBA window and copy and paste this code into "This Workbook" under the "VBA Project" group, then select "Run" from the menu:
Option Explicit
Private Const sourceSheet = "Source"
Private Const destSheet = "Destination"
Public Sub FindColumns()
Dim rowCount As Long
Dim foundValue As String
Sheets(destSheet).Select
rowCount = 1 'Assume a header row
Do While Range("J" & rowCount + 1).value <> ""
rowCount = rowCount + 1
foundValue = FncFindText(Range("J" & rowCount).value)
Sheets(destSheet).Select
Range("K" & rowCount).value = foundValue
Loop
End Sub
Private Function FncFindText(value As String) As String
Dim rowLoop As Long
Dim colLoop As Integer
Dim found As Boolean
Dim pos As Long
Sheets(sourceSheet).Select
rowLoop = 1
colLoop = 0
Do While Range(alphaCon(colLoop + 1) & rowLoop + 1).value <> "" And found = False
rowLoop = rowLoop + 1
Do While Range(alphaCon(colLoop + 1) & rowLoop).value <> "" And found = False
colLoop = colLoop + 1
pos = InStr(Range(alphaCon(colLoop) & rowLoop).value, value)
If pos > 0 Then
FncFindText = Mid(Range(alphaCon(colLoop) & rowLoop).value, pos, Len(value))
found = True
End If
Loop
colLoop = 0
Loop
End Function
Private Function alphaCon(aNumber As Integer) As String
Dim letterArray As String
Dim iterations As Integer
letterArray = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
If aNumber <= 26 Then
alphaCon = (Mid$(letterArray, aNumber, 1))
Else
If aNumber Mod 26 = 0 Then
iterations = Int(aNumber / 26)
alphaCon = (Mid$(letterArray, iterations - 1, 1)) & (Mid$(letterArray, 26, 1))
Else
'we deliberately round down using 'Int' as anything with decimal places is not a full iteration.
iterations = Int(aNumber / 26)
alphaCon = (Mid$(letterArray, iterations, 1)) & (Mid$(letterArray, (aNumber - (26 * iterations)), 1))
End If
End If
End Function
I am trying to compare decimal values in Excel VBA and delete rows that
match the criteria. This was my original code and it skipped over many rows.
For Each i In WSData.Range("A7", WSData.Range("A7").End(xlDown)).Cells
If i.Offset(0, 3).Value >= 98 Then
i.EntireRow.Delete
End If
Next
And the values on the spreadsheet are decimal values just with the % sign.
I tried "> 97.99" because Excel has some issues with floating point comparison but it still doesn't accurately compare.
Here is what it shows after using Selection.Value.
Percentages are decimal depicted with integers. For example 100.00% is stored as 1 and 98.01% is stored as .9801.
Therefor you need to adjust the threshold:
For Each i In WSData.Range("A7", WSData.Range("A7").End(xlDown)).Cells
If i.Offset(0, 3).Value >= .98 Then
i.EntireRow.Delete
End If
Next
The second problem is that when deleting rows it is best to iterate backwards. Otherwise it might miss some rows, because as each row is deleted it is moved up and then the next iteration skips the next row.
Change i from a range to a long and use this:
For i = WSData.Range("A7").End(xlDown).row to 7 Step -1
If WSData.Cells(i,3).Value >= .98 Then
Row(i).Delete
End If
Next
Edit: Because it appears there is a custom mask on the number format that is forcing numbers to look like percentages try this:
For i = WSData.Range("A7").End(xlDown).row to 7 Step -1
If WSData.Cells(i,3).Value >= 98 Then
Row(i).Delete
End If
Next
If this works then your main problem was that you were looking at column D. The offset is additive. So when you used .offset(0,3) it was moving three columns from column A. 1 + 3 is 4.
I have a set of values as following in a row:
(9,888,000) (88,410,205) (76,030,786) (62,712,494) (48,416,610) (33,102,893) (16,729,517) 746,979 19,371,753 39,191,722 43,755,624 66,114,081 89,819,671 114,926,989 141,492,724
Each value represents some amount in a specific year. e.g.(16,729,517) is the cash outflow in year 7.
Now I've an amount of 110,000,000 as the initial payment in another cell.
Now i try to calculate payback year of initial payment. For me payback period should be: 7.96 as in that year amount becomes positive.
But I'm unable to calculate this 7.96 value. can anyone please help?
i've done it via indirect method:
as first step I check value in each column and store true or false against positive and negative values.
2nd Step: =MATCH(TRUE,Complete Array,0). This gives me 8 as Digit, where it finds first positive value.
Then, as third step, i use this formula:
=Year-OFFSET(CFC,0,Year)/OFFSET(Investment,0,Year) .
in this case Year is what i got in step 2. and CFC cell is empty (Cumulative Cash Flow in 0 year). Out put of this 7.96, which is my required value.
But this is a lengthy and indirect way. I want to have a one line formula for all these calculations.
You can combine your formula into a single line. Here's a slight variation on what you are doing, which is a straight line extrapolation between the values below and above zero:
=FORECAST(0,{-1,0},
OFFSET(CashFlows,,MATCH(TRUE,CashFlows>0,0)-2,1,2))
+MATCH(TRUE,CashFlows>0,0)
You may need to change the offset formula if your CashFlows range is in a column instead of a row. The formula is entered as an array formula by holding down ctrl+shift while hitting enter
EDIT This formula ignores the very first cash flow whether positive or negative. If you want to include it, change the > operator to >= and test for an error.
Your formula approach seems natural. I am not sure that you can do much better then what you are doing, although I'm sure that an array-formula guru could find a way to wrap it all into a single, albeit not-quite readable formula.
Using VBA you can write a function which can be called directly from the spreadsheet. In a standard code module put:
Function PayBack(R As Range) As Variant
'R is a range, assumed to be 1-dimensional
'consisting of negative numbers which
'at some point transition to positive
'returns the cross-over point
Dim i As Long, n As Long
Dim x As Double, y As Double
n = R.Cells.Count
x = R.Cells(1).Value
If x >= 0 Then
PayBack = CVErr(xlErrNA)
Exit Function
End If
'x < 0 in the following loop:
For i = 2 To n
y = R.Cells(i).Value
If y >= 0 Then
x = Abs(x)
PayBack = i - y / (x + y)
Exit Function
End If
x = y
Next i
'if the code reaches here -- still negative, so return error
PayBack = CVErr(xlErrNA)
End Function
Then it could be used like:
I have your sample data in row 1 (so A1:O1) and in A3 I just entered the formula
=PayBack(A1:O1)
and it computes as expected. It returns #N/A error if there is no negative to positive transition in the data -- though that can of course be tweaked in various ways.
My first question is whether excel VBA will recognize an if statement with two constraints, i.e.
IF Range(somecell).value > 0 AND Range(anothercell).value < 100 Then:
execute code here
Because I am having a problem with getting the code enclosed in an if statement to trigger when I know that both constraints are satisfied in a script I'm running. Maybe its a problem with my logic.
I've included the code, please see if you can point out any errors in my logic or VBA.
Background Information (I also included some in the code):
There are two levers that change cell F71(D40 and D41). The requirements are that F71 be greater than 0 and it must be less than the current value for F71 (Saved in variable currentValueAdd).
So I loop through both layers iterating through all the possible combinations trying to find the optimal combination that satisfies the above conditions. Sometimes I open excel and it works fine, other times it doesn't work at all. The results are very erratic.
Private Sub OptimizeFI_Click()
Dim waiveLoop As Integer
Dim comissionLoop As Integer
Dim finalWaive As Integer
Dim finalCommission As Integer
Dim currentValueAdd As Double
Dim F71 As Range, D41 As Range
currentValueAdd = Range("$F$71").Value ' <-- This is the cell I am trying to optimize.
For waiveLoop = 0 To 7
Range("$D$40").Value = waiveLoop ' <-- one of the levers in changing cell F71
For comissionLoop = 0 To 7
Range("$D$41").Value = comissionLoop ' <-- a second lever in changing cell F71
If Range("$F$71").Value > 0 And Range("$F$71").Value < currentValueAdd Then
finalWaive = Range("$D$40").Value
finalComission = Range("$D$41").Value
Range("$E$27").Value = finalWaive * 0.05
Range("$E$28").Value = finalComission * 0.05
currentValueAdd = Range("$F$71").Value
End If
Next comissionLoop
Next waiveLoop
Range("$D$40").Value = Range("$E$27") / 0.05
Range("$D$41").Value = Range("$E$28") / 0.05
Range("$F$8").Value = currentValueAdd
End Sub
My first question is whether excel VBA will recognize an if statement with two constraints
Of. Course.
BTW, there is no "Excel VBA", there is just VBA. And it is virtually equivalent to VB.
Maybe its a problem with my logic.
Very probably. There is no immediate problem to see in your code, though.
If im not mistaken then the second half of your if condition is never true right? By this i mean that "Range("$F$71").Value" is never less than "currentValueAdd".
If this is the case then i you need to relook into your logic of
currentValueAdd = Range("$F$71").Value
as this will always send the value of Range("$F$71") to currentValueAdd and when you are checking the condition
Range("$F$71").Value < currentValueAdd
the value in cell F71 has not changed since you transferred it to the variable and so your value in the variable is the same as the value in F71 thus your second condition will never be true.
Hope it has been of some help.