How To Simplify Sequential Logarithmic Decay Formula
Sep 29, 2008
I am trying to create a s/sheet whereby one can calculate how the concentration of an isotope changes (via an exponential decay) with respect to 2 variables:
1. its half-life (arbitrarily shown as 3 'units' in cell E2), and
2. its initial concentration or dose (arbitrarily shown as 100 units) AND subsequent additional exposures (arbitrarily shown as exposure to 50 units every 3 days) (shown in column E).
Thus for example, with an initial dose of 100 units (cell E6), after 3 days, the substance would have decayed by one half-life to 50 units. However, because there was an ADDITIONAL exposure of 50 concentration units on day 3, the EFFECTIVE dose on day 3 = 100 units.
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Jan 29, 2014
I have a form made that needs to copy a value from another sheet. The Form is 10 rows 5 columns and and in format for easy print. On sheet2 I have a column where each row is filled with a name.
I need to put this name into sheet1, so in the the appropriate cell I put =Sheet2!B2 and it gives me the value (name) from the other sheet.
Then I want to copy the form bellow the 1st one so that I have the same form but with the next name, which means I want =Sheet2!B3 to appear when I copy, but since my form is 10 rows when I copy it the formula copies to =Sheet2!B12 instead of B3.
I need to make close to a thousand of this forms ready for printing and I would like to avoid having to manually set the formula for the next cell.
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Jul 21, 2006
I have a user that wants me to calculate a value for x. The user will input the variables a and b into this equation: b/a = .0231x * EXP(.0439*x). The user insists that the solution to this problem must be arrived iteratively, honing in on the correct answer. Is that right? It looks to me that surely there is a way to solve this mathematically.
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Feb 4, 2014
log linear Regression. The thing is I do not know how to calculate elasticity of logarithmic values, slope, std. error in order to make forecasts. Is there a way solve it with Linest or any other formula. I am attaching a spreadsheet to better see.
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Jul 31, 2009
is there any way of simplifying the 'IF' function in the 'Grade' column of the attached doc?
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May 26, 2006
I'm creating several dozen charts all using Logarithmic Scale and while I know you aren't supposed to provide Zero values in the source data this is one project where that can't be helped. My problem is that the Excel Alert keeps popping up to tell me I shouldn't use zeros and it keeps crashing my sheet because it pops up every 10 seconds or so.
My question is: Is there any way to turn off an Excel Error Alert? OR Is there any value I can place in those cells (other than Zero or One) that would stop that troublesome alert from popping up? Just for reference, this is the alert: MICROSOFT EXCEL
Negative or zero values cannot be plotted correctly on log charts. Only positive values can be interpreted on a logarithmic scale. To correct the problem, do one of the following: * Enter only positive values (greater than zero) int he cells used to create the chart. * In the chart, click the axis you want to change. On the Format menu, click Selected Axis. Click the Scale tab, and then clear the Logarithmic Scale check box.
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Oct 15, 2007
I'm trying to automate a process where I get a list of checks and money orders purchased then manipulate it to make auditors happy. I need to eliminate all transactions less than $3000. The fly in the ointment, however, is NOT to eliminate daily transactions by the same purchaser that may be less than $3000, but when added together are greater than $3000.
I've created a helper column where I've inserted the formula ....
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Aug 24, 2007
I'm using one spreadsheet "Take Off", to pull data from a cell which dictates an objects shape, based on this shape I have a very large IF statement that pulls data from an adjacent cell where an objects dimensions are entered, the statement than proceeds to use these dimensions to calculate the weight of the object.
I've run into the problem with only 7 IF statements, I have gone online and tried to figure out how to avoid this since it is a common problem, but I can't figure out how to do it, most of the examples show very simple and basic formulas. I am unable to figure out how to translate this into my IF statement where I make reference to many cells as well as us differant formulas within the IF statement.
My latest solution was to breakdown the IF statements and try to my my own functions but I think I am too green to have done this properly. Any guidance would be greatly appreciated.
The following is the code I'm working with followed by how I tried to remedy the situation:
=If(Or(C21="BPLT",C21="L"),(((Get_Word(D21,"First")+Get_Word(D21,3))/1000)*(Get_Word(D21,"Last")/1000)*(E21/1000)*7850),If(And(C21="PL",L21<4),(Get_Word(D21,"First")/1000*Get_Word(D21,"Last")/1000*E21/1000*7850), If(Or(C21="BP",C21="PL",C21="BAR"),(Get_Word(D21,"First")/1000)*(Get_Word(D21,3)/1000)*(Get_Word(D21,"Last")/1000)*7850, If(And(C21="HSS",L21>4),(Get_Word(D21,"First
I tried to make my own functions:
aCalc: =If(Or( 'Take-Off'!C13="BPLT",'Take-Off'!C13="L"),(((Get_Word('Take-Off'!D13,"First")+Get_Word('Take-Off'!D13,3))/1000)*(Get_Word('Take-Off'!D13,"Last")/1000)*('Take-Off'!E13/1000)*7850),"")
bCalc:
=If(And( 'Take-Off'!C13="HSS",'Take-Off'!L13>4),(Get_Word('Take-Off'!D13,"First")*2+Get_Word('Take-Off'!D13,3)*2)/1000*Get_Word('Take-Off'!D13,"Last")/1000*'Take-Off'!E13/1000*7850,"")
and so on until hCalc, but when I put them together in a cell like this:
=aCalc()+bCalc()+cCalc()+dCalc()+eCalc()....
I get an error #REF.
I realize a problem might be that I'm referencing a specific cell within my formulas, and many examples online show cells referenced in the form =A$1$, is there a differant way for referencing a cell, because currently I rely on Excel to automatically do this by way of relative reference.
ADDED: Ok I scrapped making the functions because I'm not sure and I did some research on VBA so I tried this one:
Function Weight(Shape As String, Amount As Double, Dimension As String, Optional Length As Variant)
If (Shape = "BPLT" Or Shape = "L") Then
If (Amount > 5) Then
Weight = Get_Word(Dimension, "First") / 1000 + Get_Word(Dimension, 3) / 1000 + Get_Word(Dimension, 5) / 1000 * Get_Word(Dimension, "Last") * 7850
Else
Weight = Get_Word(Dimension, "First") / 1000 + Get_Word(Dimension, 3) / 1000 * Get_Word(Dimension, "Last") * 7850
End If
But when I try to put Weight(C6,D6,F6,E6) I run into the error "Sub or Function Not Defined"
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Aug 25, 2013
I'm trying to simplified these numbers so each one only consists 8 numbers from the right w/out the blank space or +,-.
Tracking Number
Recip Phone
495905380312
(65)96502898
304612528629
6598941713
495905380746
+6596813956
486044711528
+65 9459 5540
409709299705
6750 2518
409720592221
65-6381-3351
427249160171
6581233832
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May 29, 2014
How to streamline calculations that include multiple variables.
I am trying to calculate results against weighted objectives for multiple associates. Here is a very trimmed down version of the table I have currently:
Associate
Role
Function 1 Count
Function 1 Time
Function 1 Learning Curve
Function 2 Count
Function 2 Time
Function 2 Learning Curve
Function 3 Count
Function 3 Time
Function 3 Learning Curve
[Code] .....
There is an acceptable range (floor & ceiling) of performance for each Role/Function/LearningCurve. In the example above, let's say those ranges are as follows:
Rookie/Function1/A = 1-2
Rookie/Function2/C = 4-6
Rookie/Function3/X = 10-15
I currently run a calculation for that associate determining what % of total time was spent on each function. I multiply that by the floor & ceiling of each range, summing the floors & ceilings to produce a weighted range. Then, I compare their production total to that range. I have all this figured out. What I'm running into, though, is that this table is duplicated on a separate worksheet for each month of the year. Beyond that, each member of management maintains their unique workbook listing this information for their associates only. What I would like to do is publish/maintain only one "master" workbook for all associates, regardless of manager.
I tried creating a master table that inserted columns for Month & Manager in front of the columns above. I tried to use a PivotTable (brand new to that process), but I think that because I have certain variables (i.e., Role & LearningCurve) that are "stuck in the midst" of my data, I can't make heads or tails of the PT.
Currently, I have 3 columns per function (Count, Time & LC) as only one LC would exist in a given month for a given function. I figure I can set up the master sheet to have 8 columns per function (account for Count & Time per each of the 4 LC's possible), but that begins to become more cumbersome than what I have already.
In the end, I want to have a table that I can filter by month and/or manager and/or associate to which I can then apply the appropriate calculations. This would allow calculation for a single month or range of months as well as being able to calculate results for an associate regardless of potential reassignment to a different manager, and conversely being able to aggregate results for a given manager using data for whichever associates reported to them each month.
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Jan 23, 2009
I need a formula to add data in it's respective column, only if the month and year match.
The columns of data will be very long, thousands of lines possibly.
So, basically, in this example.
in O1, if the the data in the columns below match the month(M1) and year (N1), then sum those variables.
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Jan 10, 2013
I'm just looking to step through some variables using for/next
variable1 = 2
variable2 = 7
Variable3 = 9
Variable4 = 15
For xxx = variable1 to variable4
'all sorts of fun code here
Next xxx
-obviously this doesn't work, it steps from variable1 right to variable 4....need a way so the code includes variable 2 and 3.
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Feb 8, 2010
I am creating a budget worksheet for non-technical users. They choose a starting month from a drop down menu (already created). I want the remaining 11 months to automatically fill in to the right (in a row). I have created a macro (initiating autofill) that requires them to click the button after they choose the starting month but this copies the drop down menu & Input message from the Data Validation I used to guide them initially.
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Oct 25, 2009
I have a workbook with two worksheets. Worksheet #1 is a form that will be populated with data and saved as a new worksheet, then cleared and used repeatedly as a master form. Worksheet #2 is a log / register of the unique forms completed and saved from the master each time. I need to assign a unique sequential # to each form when it is saved and record this number in a column on Worksheet #2 (the Log). I am using some macros for the copy work but struggling with the auto-numbering of the forms when completed and saved.
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Apr 10, 2007
Is it possible in Excel to automatically rename all the tabs of a workbook in one move in a sequential format - eg renamimg 52 weekly tabs Week 1, Week 2, Week 3 etc.
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Jun 19, 2014
I'm trying to create a single column of stock bin codes for eventual conversion to barcodes. The bin codes run like this:
A1A
A1B
A1C - etc. to A1H, then the sequence starts again with:
A2A
A2B
A2C etc. up to A6H, when the 1st character changes to B and the sequence starts again
This needs to continue until the sequence reaches Z6H
How to do this without having to enter each code manually?
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Nov 10, 2007
I have a column in which I enter a date, and an adjacent column which automatically enters a sequential number, using ...
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Jul 20, 2014
I'm making a Purchase Order generator for work. Essentially, the main screen has buttons and the user selects the company, job number, their name etc. They click 'Generate' and it will great a brand new excel file for them with all the correct codes, ready to populate and send to a client. In the main sheet, we also have a master list showing every purchase order made to date. This is where I am currently stuck. I will have many more questions on the way. This is my first program so very new!
Lets say we have the following in cells A1 and A2. The rest is blank:
REQ0001
REQ0002
[Code] .......
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Dec 4, 2007
I have written some code for a friend of mine, but I cannot test it because I currently don't have a printer attached to this computer. I am confident that it will work, but I would like a second set of eyes to confirm that I havent missed anything.
I have a userform with two textboxes. One of them asks how many copies of the invoice to print out, and the second one asks what invoice number to start with. THe invoice numbers are recorded in Cell I1.
[Code]......
Also, for the future, in a situation like this, is there anyway to test if the code would work without a printer? I tried substituting printpreview, but my computer locked up.
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Feb 28, 2014
I have a large sheet (currently some 5,000 rows and growing) where each row is allocated a Unique Reference, however that unique reference is based on two criteria, 'Region' and 'Type'.
There are four 'Regions' and three 'Types' across the whole sheet (see attched sample).
Because of the ever increasing number of entries and the fact that the sheet may be sorted so the unique references won't always appear in sequential order, I am looking to try and find a way for the unique refrence for 'new entires' to the sheet to be generated automatically, based on entires in other columns. The sheet structure is relatively simple, with 'Region' shown in one column and 'Type' in another (again, see attached sample).
The unique references adopt this structure - 1st letter of the region (N, S, E or W for North, South, East or West), followed by 1415, followed by the first 4 characters from the 'Type', (REGI, NATI or COUN for Regional, National or County) followed by a sequential 5 digit number 00001, 00002, 00003 etc.
resulting in for example N1415REGI00001 or W1415COUN00012 and so on.
Because there are thousands of entries, I need an automatic way for the unique reference to be generated, ideally once both the 'Region' and 'Type' fields are populated, so the macro (or whatever method works best) will automatically determine the previous highest number for the relevant series and automatically add the next number for the new entry, based on the above criteria.
I don't know if this is possible with a macro or whether there is an easier formulaic way to achieve this?
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Dec 4, 2007
I have written some code for a friend of mine, but I cannot test it because I currently don't have a printer attached to this computer. I am confident that it will work, but I would like a second set of eyes to confirm that I havent missed anything.
I have a userform with two textboxes. One of them asks how many copies of the invoice to print out, and the second one asks what invoice number to start with. THe invoice numbers are recorded in Cell I1.
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Jul 31, 2007
In the formula (range, criteria, sum_range), I have a fixed range and a fixed summary range for each column, i.e.: ($F$3:$F$805, "criteria", O$3:O$805).
HoweverI am trying to sum up units by income level (columns D, E, and F) using information from elsewhere on the sheet. I am doing this for each city, which entails changing the criteria for all of the cities I am using three times (once per column).
Is there a simple way to autofill the criteria? They are just names of cities, all in the same column, COLUMN B. Or do I have to type each individual change?
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Dec 31, 2009
I have four cells that I want to sum: =SUM(D3,H3,L3,P3)
I want to EXCLUDE the cell from the sum if the preceeding cell (C3,I3,K3,O3) has a value of "0".
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Sep 3, 2006
I need a macro that will number a cell (A1 for example) starting with the number 1, and another cell (A2) with the number 2, then back to the first cell with 3, then back to the latter cell with 4 and so on.
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Jan 26, 2007
You will probably find this very easy but I am having all sorts of trouble making it work as I want to! Basically I need to do the following procedure...
1) Open an Inputbox to collect an eight digit number
2) Insert a column in A:A
3) In A1, enter a col header (URN)
4) In A2, enter the number that was collected in the inputbox
5) Enter sequential number from A2+1 to the last row
Ideally, this would be randomised, so after stage 2 do RAND(), sort, and clear contents, but if I can get the main part right I'm sure I can work that out!
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Aug 17, 2007
I have created two names within column A (ie: Insert/Name/Define)
in cell A1 I've named StartA01
in cell A5 I've named EndA05
I would like to create a sequential number within this range via script, whereby when new rows are inserted, the script will update the order.
eg:
begin with:
A01
A02
A03
A04
A05
3 rows inserted will update to:
A01
A02
A03
A04
A05
A06
A07
A08
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Sep 29, 2007
I have variables 1-6 like the following:
dDDDD1 = Format(d1, "dddd")
dDDDD2 = Format(d1, "dddd")
They correspond to a date from a cell and I just format one for "Monday" through "Saturday". In another module I'm opening a file that has worksheets named "Monday" through "Saturday" as well. I need to do the same thing to each of these sheets so I'm trying to setup a For/Next loop. I'm assuming you can't put a variable to a variable as I keep getting 'variable not defined' when I try to insert 'i'? Or am I just going about this all wrong?
For i = 1 To 6
Workbooks.Open ("J:AcctMgtITrepADIinf-v2-WE0922.xls")
Sheets(dDDDD & i).Unprotect Password:="hownowbrowncow"
Sheets(dDDDD1).Columns("C:E").Insert Shift:=xlToRight
Sheets(dDDDD1).Columns("B:B").TextToColumns Destination:=Range("B1"), DataType:=xlDelimited, _
TextQualifier:=xlDoubleQuote, ConsecutiveDelimiter:=True, Tab:=False, _
Semicolon:=False, Comma:=True, Space:=True, Other:=False, FieldInfo:= _
Array(Array(1, 1), Array(2, 1), Array(3, 1)), TrailingMinusNumbers:=True
With Sheets(dDDDD1)
Set RngCol = .Range("A1", .Cells(Rows.Count, 1).End(xlUp))
End With
ConcName = "=B1&"", ""&C1"
LastRow = RngCol.Rows.Count
Sheets(dDDDD1).Range("$E$1:$E$" & LastRow).Formula = ConcName
Next i
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May 21, 2014
How do I go about having a formula which will return the number of times 0 is repeated in a column sequentially?
e.g.:
0
1
0
0
0
0
0
1
0
0
0
The idea being that after row 7 (there have been 5 consecutive zeroes), the count would reset when it hits a value greater than zero, and then count again once it hits a zero again.
Output for the example above should be 3.
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Jun 20, 2014
Drag & Drop Example.xlsx
In the example attachment on the weekly tab, you will see I have daily totals and a sum for weekly. On the summary tab I have the columns going down with a link to the weekly totals.
I have over 5 years of data in this format and don't want to link each cell in one sheet to another. If I drag and drop, obviously the weekly doesn't come down correctly.
Is there another way as I don't want to have to do this for over 250 weekly totals (and counting) manually.
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Feb 12, 2014
how to leaved blank cells for missing dates in a series of sequential dates. For example, If my series is (in (m/d/y) format):
1/10/1999
1/12/1999
1/13/1999
1/14/1999
1/17/1999
1/18/1999
But I want it to be:
1/10/1999
(blank cell)
1/12/1999
1/13/1999
1/14/1999
(blank cell)
(blank cell)
1/17/1999
1/18/1999
How do I do this?
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