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 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 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)
how the Process to solve the following problem:
1A = 15x + 32y + 5z
1B = 6x + 2y + 8z
1C = 3x + 11y + 19z ...
I have data that consists of a set of coordinates that is indirectly related to an angular measurement. The data set that I have consists of four sets of coordinates and four coresponding angles. The data is below.
angle,43.09,34.83,26.8,18.08,
X,174.24,187.45,202.18,213.87,
Y,140.13,121.84,103.3,81.46,
How can I get excel to give me values for X and Y based on an angle that I input, such as 22.45. plotting a graph of the X and Y gives a curved output, so the methods that I know of do not seem to be working.
I have other more complex sets of data with complex curves that I would like to use a similar method to mine data.
Below 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.
I have time (T) as a common variable located in cells A1:A9000. I also have two large data sets in columns B and C (cells B1:B9000 and C1:C9000). If I put them into an X,Y Scatter chart it is easy to see that at some point in time (perhaps around cell A3000) the slope in data set B will begin to rise and eventually the two curves will cross. I would like to find the intercept point and/or an estimate of that point (if it does not exist in the data set) and have the corresponding time reported in a set cell.
View 4 Replies View RelatedHow 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
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?
y = 1.083333333x4 - 7.3333333x3 + 16.416667x2 - 6.16667x + 4
Above is the polynomial equation of a trend line as shown on my chart, I have extracted the numbers into separate cells using LINEST, so now I have in cells A20 to E20 the numbers 1.083333333, -7.333333, 16.416667, -6.16667 and 4 respectively.With a "y" value of 25 how do I go about solving for a value of "x".
I've been stubbornly struggling with this on and off for a couple of weeks now and I'm not getting any closer to working it out and the websites I've found explaining the procedure all seem to go over my head by the time I get into the fourth or fifth paragraph.
I was wondering if the solver was the only way to solve implicit equations. I am looking for something that will automatically solve an implicit equation after the appropriate information is entered into the referenced cells.....
View 9 Replies View RelatedI have three different equations i am trying to combine to one line so I do not have to use three columns.
Equation 1.
If recommend quantity is < 100, and the Number of times part number used is one, then Recomnend quantity was used
Ex =IF(F277 100 and the Number of times part number used is greater then one and less then 10, then Recommend quantity was used
Ex =IF(G277100,*and(E277>1),F277*2.0)
I am trying to solve a set of simultaneous equations by using SolverOk function in VBA.
I dont want to use the 'SetCell' option so, I wrote the following
SolverOk MaxMinVal:=1, ByChange:= Range("V34:V36")
SolverAdd CellRef:=Range("AK4:AK6"), Relation:=2, FormulaText:="0"
SolverSolve
but I get an internal memory error. However, if I use the solver dialog box directly from excel and not through a macro and keep the 'Set Target Cell' as empty, I get the right solution.
I'm trying to find definitions/commands to make excel find the best combinations of several defined scopes and restrictions to make an output number as high as possible.
This is by using a combination of several different equations, maybe excel has a magic trick for all the variables and formulas.
Attached File: forum_heatexchanger.xlsx
I have two cells with the following equations:
H3=IFERROR(VLOOKUP(A3&TEXT($A$1,"m/d/yyyy"),'CLABSI_Raw'!$A$1:$M$300,13,FALSE)," ")
I3=IFERROR(VLOOKUP(A3&TEXT($A$1,"m/d/yyyy"),'CLABSI_Raw'!$A$1:$M$300,10,FALSE)," ")
In an adjacent cell, I am trying to use an if statement
J3=if(and(H3<1,I3<1),"yes","no")
I am not getting a return in cell J3.
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
is it possible to export a trendline equation from a graph to a cell, or at least to export the coefficients? If yes, how?
View 4 Replies View RelatedI am about to take a corporate finance course. The textbook uses a ton of basic (complex to me) equations to calculate interest rates, bond premiums, dividend reinvestment scenarios, etc.
I know that Excel has a bunch of specific functions to calculate interest, NPV, etc. but I am NOT interested in using those because I would like to have Excel "do the math" once I enter the formulas (or parts of formulas) correctly.
how to enter the equations below into Excel without using built-in formulas (I'm also not looking to use the Equation editor because I actually to calculate the answers, not just have the visual look/feel of the equation).
1R2 = [(1 + .0194)(1 + .03)]1/2 - 1
If done correctly, 1R2 in the above should equal 2.47%. I am totally fine doing parts of this in separate cells if necessary.
And something more complicated like the below. I wrote out the word "delta" because I don't know how to create the "triangle" symbol for delta on this forum post. According to the text, for securities with semiannual receipt (compounding) of interest, it is represented as:
-D = (delta P / P) / ((delta r sub b) / (1 + (r sub b)/2)))
Or in English, I believe that can be expressed as "negative D equals the quotient of delta P divided by P (in the numerator) divided by the following: delta r sub b divided by the quantity 1 plus r sub b divided by 2"
And finally
V sub b = 1000 / [1 + (.10/2)]2(4) + 50 times the following compound bracketed expression [1 - (1 / [1 + (.10/2)]2(4)] divided by (.10/2)]
I need to automate the attached as per the following (by not recording macro unfortunately).
Sheet one has a dump of data. First, I need to change the data format from yyyymmdd to dd/mm/yyyy. Then I need to filter for region EU and only copy the filtered data from columns A, C-D, F and the difference from columns I-J to Sheet 2. Then in Sheet 2, I need another column to calculate the difference per unit.
Combining two equations with MOD function for UPC check digit calculation.
I wanted to combine these if possible,
Any way to exclude colored cells from addition in a column. I will attach a simple example document.
I am building a spreadsheet to keep track of my monthly spending, and debt balance. I keep track of the total amount of bills I pay each month. As I pay them, their respective line is highlighted green in the spreadsheet. I would like to create a macro/formula which would sum the remaining cells in the column which are not highlighted to display the remaining monies which need to be paid out. I'm not sure if this matters but I am using office 2010.
billSample.xlsx
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 am using the following equation to add together up to eight different sound levels:
=10*LOG(10^H14+10^I14+10^J14+10^K14+10^L14+10^M14+10^N14+10^O14)
It works perfectly, except that due to the nature of the equation, if there are no values entered for any sound levels the answer will be 9. Is there any way to check to see if any values are present? I've been looking into IF functions and I've tried (unsuccessfully):
=IF([=10*LOG(10^H14+10^I14+10^J14+10^K14+10^L14+10^M14+10^N14+10^O14)]=9, 0, [10*LOG(10^H14+10^I14+10^J14+10^K14+10^L14+10^M14+10^N14+10^O14)])
Currently I'm working on a prediction game using excel. Can excel do the tabulation itself(Points awarded) if I just key in the result? Can anyone help me? Thanks in advance.
Examples below,
Result 3-1
Name Predicted Scored Points
Alex 3-1 5
Brian 4-1 4
Charlie 2-0 3
Derrick 3-3 1
Eric 0-2 0
Point System:
1 point for correct goals/no goal by either both teams
3 points for correct result ( Win, Lose, or Draw - say result is 3-1, 3 points if you predicted a Chelsea 2-0 win)
5 points for correct match results
No points for incorrect score and results.
I'm trying to create a lesson booking system,
View 11 Replies View RelatedI m trying make a spreadsheet up to fine the following i have also included a file
raymond ran 11 seconds so he gets 150 points which is .6 of a second better than his Personal best time (PB's) but matt ran 13.6 seconds but it is 1.1 seconds slower than his Personal best time so he is minus 275 for every .100 of a second they get 25 points added or taken off
Im looking for a ELO rating. Its a system which they often use with Chess.
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