I am trying to use the LinEst function in a program. There are some good examples on the web but they all refer to a range in the format “A1:A45”. Is there a way to refer to a column in an existing array instead?
For example (thanks to Shg for this code): ....
I have set up regression in excel using the linest array function which automaticly updates whenever the data it is references changes. Currently the formula in K3 =
=LINEST(K8:K50,M8:N50,TRUE,TRUE) .
Only the Y range in column K changes and then the formula automaticly recalculates the regression parameters. However sometimes the range of valid data changes with each new update so currently K8 to K50 contains valid values and so the formula works. But if the range of valid data now ends at say K45, and the remaining rows (K46- K450) contains #DIV/0!. In this case the formula does not work and I need to go in manualy into K3 and reselect the range to get it to work (in the baove case to =LINEST(K8:K45,M8:N45,TRUE,TRUE)
Is there anyway I can get the formula to update the range (the number of rows to use) in the calculation automaticly so I don't have to go into the formula in K3 and change the range manually everytime the data changes? Basicly I like to use all rows in column K (from K8 to K50) where there is a values and ignore cells with #DIV/0!
I'm guessing the easiest way to do this would be to set up a dynamic range of some sort that feeds into the linest array function so that the end row reference for columns K and M & N changes depending on where the first #DIV/0! occurs in column K.
I can do least squares fitting utilizing LINEST and a worksheet. (See attachment.)
I would like to do the same calculations entirely within VBA.
I can specify the values as arrays within VBA :
Sub linest2VBA()
'
' linest2VBA Macro
'
' Keyboard Shortcut: Ctrl+Shift+A
'
Dim dXvalSqd(4), dXval(4), dYval(4), dFirstRegStat As Double
Dim i As Integer
Second Question:
Is there a way to get the remaining regression statistics within VBA by referencing only the three arrays: dXvalSqd, dXval, and dYval?
Is it at all possible to refer to a array that may change in a formula?
For example I need to use a Vlookup formula, however the table array will change depending on the value of another cell.
I need the user to be able to select the column heading that the lookup should work off from a drop down list. So if the user selects column heading C, the array should start from column C though it will always end at column Z. If the user selects column heading Y the array would be Y:Z.
I'm trying to automatically add and remove one criterion from an autofilter without disturbing the previous existing criteria The autofilter code sounds like this:
Code:
ActiveSheet.Range("$A$1:$L$47").AutoFilter Field:=6, Criteria1:=Array( _
"Clay", "Grass"), Operator:=xlFilterValues
How would I go about referring to this array and adding another item called "Hard" to any pre-existing elements in this array?
I plan on attaching this code to a button and use it as a filter, so when the button is pressed, the item will be added to the list of criteria, and if it is "un-pressed" the item will be removed.
So far I have 2 Functions with a sub to test to do certain calculations.
VB:
[B]Private Sub test_getBaristaSalary()
Dim InputYear As Integer
InputYear = InputBox(Prompt:="How many years of Experience?")
[Code].....
I have this formula:
=IF(C38="C"*F38>=0,"1","")
which is meant to return the number 1 in a cell if C38 has the letter C in it and F38 is equal or greater than 0. I have met both criteria and it returns an error of #VALUE! What am i doing wrong? NB in F38 there is a Vlookup formula that returns a number (in this case it is 0).
I have a number of different formulae I want to invoke according to a choice. I am able to request the formula I want by entering them ‘in line’ as value1, value2 etc into the CHOOSE formula … e.g. =CHOOSE($H$1,IF(N3>O3,1,""),IF(N3<O3,1,""),IF(N3=O 3,1,””))
but this is cumbersome and confusing since I have a growing number of choices and some of the formulae are quite long. I want to enter them in a list and extract the formula which corresponds with the Index_num in the CHOOSE formula. I also need the cells in the formulae to be relative so this rules out using NAMES to refer to the formulae.
How does one pick up the data contained in a worksheet cell (say B5) and use it in the vba code of a custom function without passing the cell as an arguement
View 3 Replies View RelatedI'm using Excel 2003 and I'm trying to make my LINEST function and the source cells for a scatter graph use the cell range specified in another cell in the document. I figured out that it was simple to do the following:
I250 contains: 10, shows: 10
I251 contains: ="I"&I250, shows I10
But I can't figure out how to do this in a larger function. I've tried a few things but none of them work. Here is an example where I want it to do a LINEST with y values in cells Ja - Jb and x values in cells Ia - Ib (where a and b are integers specified in cells I250 and J250 respectively):
How do I make a column array variable within a function? I've done nested vlookups to get a column number, but the function I'm using doesn't use a "number", it uses a column aray. '=AVERAGEIFS(L:L,K:K,">="&B$2,K:K,"<="&B$3). The "L:L" needs to be moved according to Market, (or column choosen).
View 2 Replies View RelatedCan we use an array like {1;3;4;5} as Row or Column argument in INDEX function? Like shown below
=INDEX($A$1:$E$10,0,{1;3;2;4;5}) OR =INDEX($A$1:$E$5,{1;2;4;5;3},0)
I would like to write a formula to return a value from a column that relates to an array within which my lookup value exists. See the tables below:
ID
V1
V2
V3
105
27
3
149
[Code] .......
The tables above are on different sheets within a workbook. I would like to write a formula that returns the "ID" numbers from column "A" in the first table, based on values in columns B-D in that first table, into column "C" in the second table. For example, in this case, the ID number that corresponds with the value "12491" would be "109", since 12491 corresponds with 109 in the first table.
FYI, the "Value" numbers in the second table are calculated based on their rank (high-low) within the matrix in the first table.
I tried the INDEX-MATCH function, but it doesn't seem to work if I'm trying to find a value within a 2-D array- it only works if I'm looking in a single column.
I'm trying unsuccessfully to write a function that looks for a column in a pivot table and returns the entire column as a text string. The function should take a pivot table and a text string as an argument. The text string is the name of one of the columns. The function needs to return the entire column (excluding the header and footer rows) as an array.
In the example I pasted below, the function should take the pivot table (PivotTable1) and a color, say "Red", as arguments, and then return the values in the Red column as a 48x1 single vector array, in the order shown, starting with 43 and ending with 1. I can only post a text version of the spreadsheet; I was not able to post the actual spreadsheet.
Average of Cost
Color
Date
Hour
[Code]....
I am trying to use the ARRAY.JOIN function as recommended by Domenic in previous posts. I need to output a single column of values from a 10 x 10 grid that does not have values in every cell.
(I would also like to eliminate any blank cells from the final column.)
I can only get ARRAY.JOIN to output the first value of whatever range I select, not a column of values.
I am trying to use the ARRAY.JOIN function as recommended by Domenic in previous posts. I need to output a single column of all the values from a 10 x 10 array that does not have values in every cell. (I would also like to eliminate any blank cells from the final column.) I can only get ARRAY.JOIN to output the first value of whatever range I select, not a column of values.
how to properly execute that function. One earlier comment was that I was not specifying criteria. I'm not sure from the description and help section of "morefunc" as to what those criteria specs are, other than specifying the whole array. I am attaching a test file with the 10x10 grid & some missing values in A1:J10. Cell L1 has the ARRAY.JOIN function with the entire grid specified, but the output is only the first cell of the grid.
I have two worksheets. On one worksheet will be a place to enter a five digit number. In the adjacent cell, I want to search on the second worksheet in a three-column area for that same five digit number. The five-digit numbers on the second worksheet are located in the third column and the text I want returned from the second column. I cannot change the order of the columns as the first worksheet will be an "add-on" worksheet to a widely used spreadsheet within our company (this spreadsheet already has the second worksheet formatted).
View 9 Replies View Relatedi'm having in excel- I'm looking to populate rows in 2nd tab based on the data entered in the 1st tab. The rows to be populated in the 2nd tab resides in the 3rd tab. So a match has to be made on the data entered in the 1st tab. When a match is found on the 3rd tab then the corresponding rows from the 3rd tab should be listed on the 2nd tab.
I have an example.xls attached for clarity.
example.xls
I have a table something like this (much bigger in reality)
1 5
2 10
5 15
7 #N/A
9 20
12 25
I need to interpret the above data with the linest function, but for a variety of reasons i cant delete the error square. How can i get the LINEST to ignore the #N/A and the 7? otherwise it returns an error.
I am using Excel 2007. I have two sets of data. y-series is 58.61, 58.66, 58.71 and 58.76. x-series is 0.8313, 0.8309, 0.8305 and 0.8301.
I am trying to fit a quadratic function to this data. When I plot a curve and fit a trendline I get the coefficients for the equation ax^2+bx+c
a=1.3939e-11
b=-125
c=162.5225
The plotted line seems to fit the data fairly well.
However, I want to use the linest function and I am using the formula:
=INDEX(LINEST(B2:B5,A2:A5^{1,2}),1,1)
I change the index column number as appropriate to get the coefficients:
a=-75.23775
b=0
c=110.603763
The coefficients from linest seem to be way out. how I can get the output from linest to be the same as the trendline?
My "calculated" polynomial is not the same as the Trend line on the graph. The one on the graph seems to be correct.
Basically, I am using the LINEST function to create a polynomial equation inorder to extrapolate data. And also with a given equation, and a given y, find x.
I'm trying to implement the linest formula in a programming language for my coursework.
I've looked on excel help but it only explains on how the function selects data.
how to the values are calculated and the steps?
I am calculating variables in Vba and want to find their co=effiicients in the for y=a +bx +cx^2. This works great if I output my variables to excel and then pick up this range however as I am generating the variables in vba and have an array of variables I would rather not have to keep spitting them out to excel then picking them up again. The three important lines in my code are:
c(nFix - j) = WorksheetFunction.Index(WorksheetFunction.LinEst(inpv, Application.Power(inps, Array(1, 2))), 1)
b(nFix - j) = WorksheetFunction.Index(WorksheetFunction.LinEst(Range(Vc), Application.Power(Range(SPd), Array(1, 2))), 1, 2)
a(nFix - j) = WorksheetFunction.Index(WorksheetFunction.LinEst(Range(Vc), Application.Power(Range(SPd), Array(1, 2))), 1, 3)
As you can see for c I am referring to inpv and inps these are arrays. I have tried using inpv(), etc but no luck
b and a work great, here I am reffering to ranges Vc and SPd. As I am going through this a lot of times it seems rather inelegant not to be able to do the whole thing in vba - i would rather not use the dump to spreadsheet then pick up again approach!
On sheet 1 I have a list of 1000 firstnames
On sheet 2 I have a list of 1000 emails,
I need a function that states If a cell in the email column contains a string or value from the names column, it will result in a true statement so that I can separate out the emails that have these peoples first names.
is there a way to use LINEST in a way in which the x values are unknown and the y values are known? The opposite of how the function usually runs...?
View 2 Replies View Relatedhow to get my LINEST function to work properly. Now, what I'd like to do is have it reduce or increase the order of the polynomial until R^2 equals 1.0, or the polynomial reaches 6th order, whichever comes first.
Can I do this with a bunch of nested IF ELSEIF statements, or is there a cleaner way to do this?
I am trying to obtain the 3 coeffs from a polynomial trendline equation.
The equation produced on the chart is
y = 3.1123x2 + 135.34x + 124.9 from the below info
X Y
1.0 250
2.5 500
5.0 890
7.5 1290
10.0 1800
But when I enter this array formula
{=LINEST(B2:B6,A2:A6^{1,2})}
I get different results.
-48.98,375.89,214.98
I need to know how to selec no-adjacent columns for the known_x's in the linest function:
Example:
'- A B C D E
1) 80 63 9 3 26
2) 80 63 9 3 21
3) 74 65 7 2 30
4) 74 65 7 2 20
5) 63 65 9 3 16
=LINEST(A1:A5,KNOW_X'S,TRUE,TRUE)
Is there any way to select for instance: column B and E as known_x's?
I heard about something where we can select total area and then choose which columns should be considered via "{column1, colum2}"..
That is all is missing for me to finish my project!!! Pls your help!!!
I have built a user defined function called: portAlpha.
Code:
Function portAlpha(assetCode As String, indexCode As String) As Double
Dim assetCol As Long
Dim indexCol As Long
Dim assetData As Range
Dim indexData As Range
With Sheets("Data")
[Code] ......
I am struggling to get this to work though. Everytime I step over this piece of code:
Code:
portAlpha = Application.WorksheetFunction.LinEst(Range("M4:M63"), Range("N4:N63"), 1, 1)
I get a "Type Mismatch Error". All the values in the range are numbers, and LINEST should return a double, so I am puzzled as to why there is a mismatch...
I have hardcoded the range into the formula just to try and get it to work. Eventually this will be two variables and will look like this:
Code:
portAlpha = Application.WorksheetFunction.Index(Application.WorksheetFunction.LinEst(assetData, indexData, 1, 1),1, 1)
I have instances where my Y variables sometimes contain a zero in the data and i need a formula to skip over that data point in the LINEST calculation.
Y variables are in Row 1, Columns A:E
X variables are in Row 2, Columns A:E
The following formula is returning a #VALUE! error: .....