Autoselect Range/Row Reference For Linest Array Function
Dec 31, 2007
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.
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Jan 13, 2010
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): ....
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May 7, 2005
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?
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Jan 9, 2009
In a worksheet is a table:
a b c d
e f g h
i j h l
m n o p
q r s t
I'm looking for a procedure to (with the help of
an array) reproduce this table exactly under the original one
with one row between them but in the folowing form:
q m i e a
r n j f b
s o h g c
t p l h d
the procedure should be applicable on any haphazard
regardless of its place on a worksheet
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Jan 28, 2013
I have the below formula
=IFERROR(INDEX(Settlements!Account_No.,AGGREGATE(15,6,(ROW(Settlements!Account_No.))/(Settlements!Settlement_Date=TODAY()+1),ROWS(N$2:N2))),"")
I would like to copy it across and use different named ranges for the red part, hence have it reference to a cell with the name of the range.
i.e. (which doesn't work)
=IFERROR(INDEX(Indirect("Settlements!"&N1),AGGREGATE(15,6,(ROW(Settlements!Account_No.))/(Settlements!Settlement_Date=TODAY()+1),ROWS(N$2:N2))),"")
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Jul 15, 2014
Using VBA, I am importing data from Access (Access2007) into Excel. The code that I use works as required but I need to refine it so that I can filter for the records that I need to import. I can import ALL records. I can import selected records by manually changing my SQL query. I would like to reference an array of values or a range of cells so that I do not need to manually change my query every time I want to run it.
[Code].....
This code gets all records for "Jeff" and "Bob" from the Access database. I need to query about 100 names at a time so manually inputting them is going to take forever. How I can make it work?
By using an array:
[Code].......
or
by using a range of cells:
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Mar 2, 2009
I'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):
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Dec 5, 2013
I am trying to use the AVERAGEIF function to give calculate averages based on dynamic data. The formula I want to work is:
[Code].....
but this returns the "#DIV/0!" error.
However,
[Code] ....
returns the correct value.
I want to be able to calculate averages of only the cells that are greater than the value of cell D6. Is there a way to do this?
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Apr 30, 2009
How would I used the indirect function to reference a named range in the workbook in formula creation.
For instance, if in cell A1 I have entered the text "Sales" which is also a named range in the workbook. Then in cell A2 I tried entering the following formula to sum based on the entry in cell A1 using the indirect funtion. For instance:
=sum(indirect(A1))
In this instance I was hoping this formula would then sum the amounts in the "Sales" named range. And, if I changed the text in cell A1 to "Cost" for instance (another named range in the workbook), it would sum the amounts in the "Cost" named range. Allowing for a dynamic formula based on the entry in cell A1.
I'm using Excel 2007.
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Feb 14, 2008
I have a split named range covering non-contiguous areas, ie:
Name: status_web
Range: =$F$14:$I$122,$F$700:$I$746,$F$798:$I$830,$F$905:$I$933
This appears to work fine when selecting the name however it returns a #VALUE! error when using it in a formula, eg: = COUNTIF(status_web, "*p*"). Is there any way to get this to work, or do I need a separate named range for each contiguous section? NOTE: Not sure whether this extra fact would through a spanner in the works, but I am referencing this named range from a separate workbook.
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Feb 28, 2008
Is there a way to start match from a relative position?
Say a match I have in column "A" returns 344. Is it possible to start a new match for column "B" from that spot, instead of having it return a match starting at the top?
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Jul 25, 2006
code to pass a range say (A1:A3) as an arguement among other arguements to a custom function and then reading this as an array inside the custom funtion
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Mar 3, 2014
I'm looking to loop a comparison code. I'm using dynamic referencing (using x and y) to find maximum values for specific time intervals. The code works on a cell to cell basis, meaning if I input the formula and change the cell referencing manually then the equation will give the desired results. However when I attempted to create a VBA code to speed up the process I kept getting a 1004 Unable to set FormulaArray Property of the Range Class error, I later figured out that the Formula Array function is limited to a certain number of characters so I split up my function into 3 different string formulas. I still get the same error.
[Code] ............
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Mar 20, 2009
Another interesting dilemma to solve. Using this formula:
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Jul 25, 2012
I want to know how to copy a range into an array then an array back into an range.
Code:
Dim a(3,3) As Double
a(3,3) = Range("C3:E5")
Range("C10:E12") = a(3,3)
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Jun 19, 2008
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.
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Jan 22, 2009
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?
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Oct 23, 2008
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.
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Feb 12, 2010
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?
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Nov 12, 2008
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!
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Jul 14, 2014
Is it possible to reference a cells value to define a range reference?
[Code] ......
I am trying to define the row value in the range reference with a value in a secondary cell?
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Feb 11, 2010
I'm setting up an Excel (2000) sheet to record the results of a competition at my local photographic society. I'm trying to make it as simple as possible to fill out by the people using it, so have shaded the cells that require the user to put data in. I'll post a screenshot of the sheet, which is named "DPI", to make it easier:
(EDIT) screenshot removed - see attached file in post #3 below instead
I use one row for each member entering the competition. Each member can submit up to three photographs for judging. The names in B5:B30 are tied to the member number in A5:A30, and pulled in with VLOOKUP from a separate sheet containing all the club's members. The names in this example are, obviously, fakes. ;-)
The three blocks are to enter the image titles and associated scores. I have a range called "scores" which is defined as =DPI!$D$5:$D$30,DPI!$G$5:$G$30,DPI!$J$5:$J$30
The rank columns are simply calculated using the RANK function. E.g. the formula in E5 is =IF(ISBLANK(A5),"",RANK(D5,scores,0))
The cells at the top are calculated using the LARGE function upon the defined range "scores" (although they could equally use the SMALL function on the rank columsn instead).
The bit I'm stuck at is what I want it to say along the top. eg: "Leg 1 Winner: 30 is {insert image title} by {insert member name}"
Using the winner as an example, I want to take the winning score shown in D1, find it in the named array "scores", and return the image title to the left of it. Obviously I can't use VLOOKUP as the data is to the left of the lookup value as well as being in multiple columns. I wanted to use OFFSET to return the value of the column to the left, but to do that I need to pick up the reference of the cell containing "30" i.e. the winning score shown in cell D1.
How can I find this cell reference? Or is there a better way? I thought about the old MATCH/INDEX function, but INDEX doesn't seem to work very well with data in non-contiguous arrays as I'd have to specify which block to look in.
Once I can get the image title returned I hopefully sholdn't have any bother extending it to return the member name from a fixed column, but I can't figure out how to get the reference of the cells in the "scores" array that contain the winning scores shown in D1, D2 and D3.
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May 27, 2009
Using Excel 2003, I'm summarizing info in one sheet (Review) with data in another worksheet (Work Orders). The following SUMPRODUCT calc worked fine...
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May 4, 2006
I find myself needing this often and hope there is an elegant formula that can make this easier.
Is there a formula that will test if a particular cell is referenced somewhere in another array or vector? Specifically, I find that I have to aggregate long lists into categories to fit budget formats of various lenders and investors. For example, my detail budget has separate rows for Water, Sewer, Garbage, Electrical, and Gas. These expenses have to be aggregated on one funder’s budgets as “Utilities.” Sometimes after going through this I find that my totals don’t add up, i.e. I left an item out of the aggregated budget. I would like to be able to add a column on the detail budget to test if each budget item has been referenced in the aggregated budget.
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Jun 23, 2014
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...?
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Sep 2, 2008
how 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?
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Dec 21, 2006
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
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Jun 24, 2014
I have attached what my problem is. Have a look, and let me know what you think...have spent hours trying INDEX, MATCH, IF, ISTEXT...
JamesExcel problem.pdfExcel problem.pdf
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May 27, 2009
Sheet 1 contains:
Item Sheet 2
ABC =vlookup(A2,'Sheet 2'!$A:$B,2,false)
Sheet 2 contains:
Item Data
ABC 2
I'm trying to get the vlookup to return the value "2"
Right now, I'm manually entering the tab name in the vlookup function, even though it's contained in cell B1.
The tabs are contained in the same workbook if that matters. Since this workbook is growing rather quickly, this is a painful process and doesn't feel very scalable. Since I'm using a mac, I need to do this with functions vs. macros. Does anybody know how I can reference a cell for the name of a tab in the vlookup function?
I was thinking I could maybe somehow do this with the INDIRECT function but I'm stumped.
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Aug 7, 2013
I have a array as
01-12-2008 pump-1 25
01-12-2008 pump-2 28
02-12-2008 pump-1 24
03-12-2008 pump-1 26
03-12-2008 pump-2 38
03-12-2008 pump-3 35
I need sum value as
03-12-2008 pump-1 75(=26+24+25)
02-12-2008 pump-2 if no answer blank
03-12-2008 pump-2 66(=38+28)
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