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
I had a question about adding numbers, sort of like algebra equations (best description I can think of) into a spread sheet. Example:
Cell A1: 8
Cell A2: 8l
Cell A3: 8ls
Cell A4: 8l
Cell A5: 8
Cell A6: -where I want the total to be displayed in the following way: 16+16l+8l
Is this even possible to calculate by grouping like numbers?
I put the "Insert new equation" button on my "Quick Access Toolbar" but it is grayed-out, as in, unavailable. The weird thing is, I also have a "Insert Equation" button on the same toolbar, clicking that opens a small menu of ready stored equations and at the bottom there is another "Insert new equation" button, that is also grayed out. However simply clicking the "Insert Equation" icon puts allows me to insert a new equation, as it should be. The same is true for the "Insert Equation" button in the "Insert" tab.
I am working on a new excel file, i.e. it is a .xlsx file with only one sheet. It worked for me before but I did a windows reinstall and now it doesn't.
Also while on that subject in Word 2010 you can put a "Insert Symbol" button on the "Quick Access Toolbar" which, when clicked, opens a small menu of recently used symbols, while its Excel counterpart directly opens the entire Symbol catalog. Any way to put a button on the Excel "Quick Access Toolbar" that behaves like its Word 2010 sibling?
I have several hundred points in cartesian x,y,z coordinates. I used an Excel add-in program to calculate the equation of best fit to the points. The equation is:
z=A*x+B*y+C
where (for this case):
A= 2.29091
B= -1.77338
C= -192.494
My objective is to define the several hundred x,y,z points in cartesian coordinates about a new cartesian coordinate system whose origin is the centroid of the data points and whose z plane (ie z=0) is equal to the best fit plane defined above (when referenced from the original coordinate system).
Using Pro/e (a cad program), I was able to create the new coordinate system using the x, y, and z intercepts from the best fit plane, and then was able to redefine the points about the new coordinate system. After the points were redefined in Pro/e, I was able to export the points back to Excel; however, I would prefer to only use Excel / VBA because I prefer the calculations be transparent for optimal accuracy and validation.
I am given the function
y = a x + b
And I am supposed to ask the user to enter a value for a and b twice
So I could have 2 equations and solve them
The problem is I am not sure how to solve the 2 equations using VBA?
I don't actually own Excel as yet - but I'm wondering if someone could tell me whether Excel is capable of solving what I'm told are 'polynomial equations'. An example of the sort of equation I hope to solve is: d/(1.18 + d) + d/(1.86 + d) + d/(9 + d) + d/(8.8 + d) = 2
d=? {I happen to know d = 3.65(approx) in this example btw}
Often there will be many more than four terms...
I have a system of 3 equations with 3 unknowns that I would like to solve in Excel.
The equations are
24.792 = A*e^(B/(100-C))
9.857 = A*e^(B/(70-C))
4.590 = A*e^(B/(40-C))
Where e is the exponential function.
I am trying to analytically solve an equation to establish a physical value. Unfortunately, it's difficult to do the algebra, so it needs to be done this way.
I have an experimental value for this in "J2", so what I want to do is change F2 to that "I2" is equal to "J2"
Is it possible to get excel to match these values - I have about 200 different cells of this?
The formula is in cell "I2"
=B2*((1-(C2/D2)*((F2/G2)^1.2))^-1.5125)
Want to write an if then that states if a cell ends with (or includes) .com or .org then = "", if not then = "1".
View 3 Replies View RelatedProblem solving multiplication of two matrices with entries decimal in vba code:
Code:
Option Explicit
Public MatrixA(30, 30) As Long
Public MatrixB(30, 30) As Long
Public MatrixC(30, 30) As Long
Public RowA As Integer
Public ColA As Integer
Public RowB As Integer
Public ColB As Integer
Function ProperMaticesSizes() As Boolean
[Code] .........
I had 4 initial temperature values and after some time i got new temperature values. Now for calculating 2nd iteration i need to use new calculated values and for third iteration values from 2nd iteration is to be used and so on.
How to calculate temperature values directly for 10th iteration without solving each iteration?
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 RelatedCan 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
I 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.