Can I use excel to get make an equation for 4 variables (x,y,z,w)
E.g.
a,b,c,d,3,f,g,h,i, would be constants
w = ax + by + cz + dx^2 + ey^2 + fz^2 + gxy + hyz + iyz
I tried regression but the equation looks like
w = ax + by + cz + c
Is it possible on ay other software e.g MATLAB
Can excel solve an equation for x with two variables.
Example: 102=125000(X-910)/50000.
I need excel to solve for X
The variables are 102 and 125000
Unzip Code - Works without Variables, Breaks with Variables.... This has been driving me bananas...
I have the
How do I get to see the equation behind Excel Functions? For instance, the
result of pmt() is not making sense to me, I'd like to see what this function
is doing and how it is calculating its value. Trial and Error is rather
time-consuming and tedious.
It looks like this (log(X/Y))/log2. The X and Y are celldirections (E2 or F4 and so on). How do i setup that formula in excell?
View 2 Replies View RelatedI have the following formula.
=SUMIF(hfx!A:A,"123456789",hfx!J:J)
very simple.
for the totals in J, if there is a (-) negative number, i would like that excluided from the equation.
Lets say I write an equation on my sheet such as:
='A1'!$H422*AH$138
but instead of hard coding the A1 sheet name, I want that to be a value that I can put in a different cell (lets say cell C1) on my same sheet in such a way that it will reference the value in my other cell (Cell C1) and put its value into that equation.
So if I make the value in C1 = A99 then the equation becomes
='A99'!$H422*AH$138
i am plotting graphs which i need the equation of the line from. i have been manually typing the x^3, X^2, X^1 and X^0 values into 4 cells which is then used elsewhere, but wanted to know if its possible to get some code to do that for me?
View 2 Replies View RelatedBelow is a nonlinear model, together with calibration data for which I would like to find the parameters Ro, Kc, a and b.
R = Ro + Kc * (1/(1 + exp(-(a + b*lnC))
Calibration Data
C R
0.00.3347
4.80.4201
7.70.5141
11.20.6177
14.40.6887
Given the calibration data above, how can I calculate or at least estimate these parameters?
I do not want to use an add-in program, like Solver, in Excel. I do, however, want to be able to use any existing functions, if necessary, in Excel. i'd appreciate it if someone can walk me through the steps.
The equation is basically: 10^[A/20]+10^[B/20]+10^[C/20]. Now imagine that there is no input value for C. I need to make it so that it won't add the bit I've highlighted in green.
View 5 Replies View RelatedI will like to ask, if there is a way to get in a cell the result of a simple equation without having to copy the contents of that cell with a = in front for example if i have in one cell
15*2+35*4+30/2
in the next cell to display the result
185
I need to take a number, multiply it by a precentage, & then round it to the nearest multiple of 5.
ex:
A1=142.5
B2=A1*50%,(then rounded to nearest multiple of 5)
if i obtain an eqn by plotting a graph in excel, etc,
y = 1.22952117E-06x3 - 1.08197863E-05x2 + 9.97531712E-01x + 3.99014495E-01
and i wish to subsitube a cell value from another sheet into the 'x' in the above eqn and i need to do this 20 times.
I need to move a value to another field (with equation) and use the output for the same equation till limit is reached..
View 2 Replies View RelatedHow to add an equation to a drop down selection if you take a look at the picture in the link supplied, what I want to do is: I want the calculator to take the number in D12 then if the drop down box under it the selection is (as it is) too high then subtract 50 (k11) from D12 and display the answer in D14. I have listed the 3 drop down choices in column L, Lap 2 I would do exactly the same and so on [URL] .........
View 6 Replies View RelatedI have a cell on ' Sheet 2' with the following formula:
=MAX('Sheet1'!C3:'Sheet1'C10)
ie. it chooses the maximum value from column C between rows 3 and 10 on "Sheet 1".
Lets say the cell reference C10 is now entered into cell B1 on Sheet 2. How do I modify the above formula to reference B1?
I have tried INDIRECT function but can't get it to work.
I am trying to calculate the equation of a curve which best fits some data. On the x-axis is date and y-axis the readings. The curve is quadratic, so on the chart I am fitting a 2nd order polyomial and displaying the equation. To prove that the equation the trendline gives me is reasonable, I am applying the equation on the x parameter to get the y parameter estimate and looking to see the error between predicted and actual - see attached.
The equation and the output from it are clearly rubbish, even though on the graph the trendline is a reasonable fit - see attached. Has anyone any ideas why? I think it has something to do with using a date on the x-axis but no idea why. Is there a way to correct for this? I also tried using the following I to calculate the coefficients which came up with a reasonable forecast (although linest should only be used for linear data): =LINEST(C3:C15,B3:B15^{1,2,3})
I have the following 2 formulas that determine the top 2 scores and return the respective headers, but they aren't perfect.
=INDEX(T1:V2,1,MATCH(MAX(T2:V2),T2:V2,0))
The above returns the max, however doesn't take into account scores that are a tie or 0 values
=INDEX(T1:V2,1,MATCH(LARGE(T2:V2,2),T2:V2,0))
The above returns the 2nd highest value, but some instances the output is correct (if there is a tie or a 0).
How can I fix both of these equations and also determine the 3rd highest score?
I have two cells (c1 and c2).
c1 contains (2+3*4)*3 without "=" at start.
c2 must contain the result of c1 it means 42.
In the attached file I have a few variants I tried to solve it but they both don't fit.
Formula.xls
I'm familiar with 2d graphs, trendlines, and regression equations. Now I have some tabular data that has 2 input variables and a result. As with my 2d data, I would like Excel to create a polynomial equation of z from the x and y inputs. Can Excel do this, or do I need a plug-in or another software package?
View 12 Replies View RelatedIs there a way to use =sumif to sum if the cell has the word you are searching for plus other words you haven't identified.
For instance if I have =sumif(a1:a3,"vacant",a:a) , is there a way I can sum if the cell has "Vacant until next week" without me typing the next week"
I have attached a sample spreadsheet.
I want to show units on x-axis as 10^10 but it will not let me insert equation. How can I do this? I am using the most recent version of excel.
View 1 Replies View RelatedAny way I can get an equation to only apply to cells with information in? E.g. I have two columns, one with 'disposal dates' in and the other with 'extended disposal dates'. I would like to get the difference between them (Extended disposal dates- disposal dates) however not all of them have an extended disposal date, therefore some cells display as '#VALUE!' because its calculating the disposal date-blank cell....
View 3 Replies View RelatedI want to do is a simple list, 2 items, call them "Thing_1" and "Thing_2". I have an equation in a column of cells. The equation is a simple If statement. If the user selects "Thing_1" then the first equation will run, and if "Thing_2" is selected then the second equation will be used. That's it. No more complex than that.
My original questions about how to initialize a ComboBox are cross-posted here: http://www.excelforum.com/excel-prog...ml#post1996135
What I would like to do is use a drop down list Type 1, Type 2, Type 3 etc and then be able to use whatever is selected to reference a value in another cell.
Excuse my ignorance but something like Cell 1 * (If Type 1 from the list is selected use figure in Cell 3, If Type 2 from the list is selected use figure in Cell 4..........) etc etc
Is it possible in excel to find the equation for a curve?
I have 6 known x,y data points on a curve. I need to find the equation for the curve.
How to do the following, which solves the equation, in Excel.
LH
W1
W2
(LH-X)/(LH+X)=W1/W2
(6-x)/(6+x)=.6/1.25
6*1.25-x*1.25=6*.6+x*.6
7.5-1.25x=3.6+.6x
7.5-3.6=1.85x
3.9/1.85=x
x will equal 2.108..... in this case
to create the following formula which I'm now repeating in more elaborate forms. At the moment I am using the formula below but I need to get the bit in red in the second half of the formula to search on more than the one condition.
Currently it is searching a postcode abbreviation field and is picking up all those with 'BS' however I don't just want to search on BS. I would like to search on BS, BA, SN, TA, GL. I have tried putting different combination using commas and plus signs etc in but excel doens't seem to like the way I'm doing it.
=SUMPRODUCT(--(Sheet1!$T$3:$T$10000=A49),--(Sheet1!$S$3:$S$10000="BS"))
I have two cells (c1 and c2). c1 contains (2+3*4)*3 without "=" at start. c2 must contain the result of c1 it means 42. I think it has a very simple sulution but I don't know it. In the attached file I have a few variants I tried to solve it but they both don't fit.
View 3 Replies View RelatedI'm in the middle of designing a sheet that (amongst many other things) takes the equation of a graph trendline, pastes it, and calculates the various values along it. I can do it by hand, but when I try to record a macro, it doesn't register that I've highlighted the equation and hit copy. Here's the code I'm working with:
Sheets("Graphs").Select
ActiveSheet.ChartObjects("Chart 1").Activate
ActiveChart.SeriesCollection(1).Trendlines(1).DataLabel.Select
Selection.Copy
ActiveWindow.Visible = False
Windows("Copy of HRA Design calculator1.xls").Activate
Sheets("Binder @ max. stability").Select
Range("A1").Select
ActiveSheet.paste
The problem is line 4 - it can't copy because the text isn't selected.
