# Estimate Linear Formula From Multiple Coordinate Pairs

Aug 13, 2007
I have 32 pairs of coordinates (X,Y). If I graph them using a scatter chart in Excel, I can see that it looks like they suggest a linear relationship between the points.

Other than printing the chart and trying to draw a "best fit" line manually, is there some sort of way I can get Excel to come up with the "best" linear formula (y=mx+b format)?

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May 15, 2013

I'm trying to use DGET to pull coordinate pairs from a list and match them up to a label based on certain criteria. I can't seem to get it to work. I'm also thinking that the way I have it set up, the coordinate pairs might not stay together and that has to be the case. My criteria is multiple cell based too and I don't think DGET can handle that.

For example, In order for a coordinate pair to be labeled "B" the x coordinate must satisfy a condition and the y coordinate must satisfy a different condition. Can I use DGET with the AND function?

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Oct 16, 2008

I would like to run a multiple linear regression in vba. I have one dependent and three explanatory variables. I will have to use a macro of some kind, since I need to run too many regressions to do it manually. To simplify things a little bit:

- There will always be exactly three independent variables

- There are no missing values

- The data is allways numerical

I've already got four ranges defined: Yrange, X1range, X2range, X3range. I would like to take these ranges as input parameters for the regression model. The only two parameters I need are Sum Square for Regression (SSR) and the degrees of freedom. I understand that you can use excel's matrix formulas to calculate some of the input parameters, but one doesn't really get around vba. Any (simple) source code allowing me to conduct a regression with three input parameters?

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Aug 14, 2007

How do I express the following as a formula for range f2:h2:

case 1

if any number is equal to 0 or 5, then 1

if any number is equal to 1 or 6, then 2

if any number is equal to 2 or 7, then 3

if any number is equal to 3 or 8, then 4

if any number is equal to 4 or 9, then 5

example:

f2:h2=3,5,9

result

415

f2:h2=0,2,7

result

133

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Jun 24, 2008

I am currently working on a data analysis project (data mining) and need to collect and later analyze statistics for the inputs which control a series of calculations. These statistics are shown in the Statistics 1, Statistics 2 and Statistics 3 cells in the workbook that I attached. The inputs are X,Y; all possible values for these inputs are listed in the N,O columns. Basically I need a macro which would take the values from these two columns and place them pair after pair into the controlling cells (K3, L3), then it would copy cells H2 through L3 (updated stats) to a new sheet after each copy operation - so that I will finally have a list of statistics for all of the input pairs.

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May 20, 2014

I have a series of data (and corresponding chart) showing financial data over time. The timestamps are all from the first of the month (01/02, 01/03, 01/04 etc).

I would like a formula that can take a date (not limited to first of the month) and provide the corresponding 'y' value.

I have tried LINEST & TREND & FORECAST forumlas but either can't get them to work, or they don't like dates!

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Mar 27, 2007

i wanted to ask that in excel i have different values, if i post on ere its so long actually i cant post it coz it will tke ages to do so; so wot i wanted to no that how to estimate total income of values? and how to estimate annual profit/loss?; i mean the formula to find these terms.

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Mar 9, 2012

I have columns A through AKP (A:AKP) with data, and there is a varied number of rows for each column. If possible, I need a macro that will "stack" columns in pairs of two. For example, column "C" directly under column "A" and column "D" directly under column "B" and so on for all columns A:AKP.

This is an example of what my data looks like:

COLUMN A COLUMN B COLUMN C COLUMN D

ROW 1 2598 F800 2599 F800

ROW 2 2598 K1300 2599 K1300

[Code].....

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Aug 14, 2009

You know when you open a picture using windows paint,

there's a coordinate on the bottom right of the screen right?

Now, Is it possible to make a macro that records the coordinate everytime i maka a dot using "pencil" feature in paint?

So everytime i click on a spot in the image (draw a single dot), excel would track the coordinates of these dots and write it vertically in 2 columns (x & y)... the result is something like this :

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Nov 20, 2009

I am setting up a spreadsheet to be able to calculate loads on spread footings. The thing is the footings may be as small as a 2 x 2 or as large as a 6 x 6 or any combination inbetween so I need a coordinate system (to the nearest inch with a max of 1800 inches) to be able to assign each spread footing to a certain spot in the system with which I can calculate the soil stresses.

I intend to make this as idiot proof as possible for anyone who uses this spreadsheet so I was going to set it up as in the attachment where a user can input each individual load on each footing and the distance between it and its neighbors. The numbers are just random values with in each footing and feet between each one. Naturally most people would probably begin data entry in the upper left footing first so I was going to make that the origin unless for coding purposes the lower left would be best.

In this case the upper left footing would be 0,0 and the footing to its right 20,0 and the one farther right 55,0 (20+35) and so forth.

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Jun 28, 2012

I have the following data points:

A

B

1

X

Y

2

0.18

0.52

[Code] ......

And can create a scatter diagram fine. However, I've been asked if it's possible to show on the graph, for each point a line to it's respective X and Y co-ordinate. For example, for row 4 (in red), on the same scatter graph, I'd like there to be two lines for this point,

Line1 drawn from (0.1, 0) to (0.1, 0.26) and

Line2 drawn from (0,0.26) to (0.1,0.26)

I know it's possible to overlap graphs in Excel, but I can't find how to achieve this with scatter plots

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Jan 24, 2008

I have a spreadsheet of several sheets, but 7 of them (Red, Orange, Yellow, Green, Blue, Purple, Black) are the guts of the file and where I make adjustments. The layout of these sheets is the same, there are several cells of data on each sheet that coordinate with data in the same cell on other sheets. The problem is the sheets are so big, when I change sheets I have to go find the data that was in the same cell (or close) to where I just was on a previous sheet. So for example if on “Red” I am in cell AX253 and I go to sheet “Yellow” I would like it if AX253 would be selected when I get there. And if I select a different cell like D56 on Yellow and pick Green then I want D56 to be automatically selected on Green.

In addition, I plan to use a check box on an eighth sheet called “White” to turn the feature on and off. I have never written code for a check box before.

Is this to terribly difficult to do? I did some searching and saw some code that was similar to this but could not get it to work.

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Feb 9, 2009

I generate a large dataset of X- and Y-coordinates. Togeter, these datapoints form random curves. So, in excel, I want to calculate the Y-coordinate of the center of mass of these datapoints.

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Feb 15, 2008

I often find that it would be useful to have a data type for geographic coordinates (i.e. latitudes and longitudes) that would e.g. permit/facilitate formatting negative values as South and West, direct subtraction of one latitude/longitude from another, conversion of degrees-minutes-seconds to decimal degrees, properly formatted axis labels when using Excel to draw maps (at the moment, I am editing the axis labels in the PostScript file by hand, when I don't use chart labeller to paste axis labels in) and so on.

(Time formats could be used, if only they could be prevented from converting hours over 24 to days, which I have not found out how to do.)

Therefore: does anyone know of any Add-In out there somewhere that could supply the lack of a geographic coordinate data type?

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Jan 3, 2012

I want to combine all data in a single graphic. It must be like a coordinate system.

The file is in that address: [URL] .......

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Jul 10, 2009

I am trying to import a BASE ESTIMATE table into EXCEL.

I have problems with most of the formulas, especially this one:

=VLOOKUP($E$2,$B$24:$P$604,HLOOKUP($E$3,$D$22:$L$604,1)+2)*HLOOKUP(HLOOKUP($E$3,$D$22:$L$604,1),$D$2 2:$L$23,2)

and this one

=ROUND((IF(AND(OR(E7>E5,E7>E6),E3<40000),E7,IF(AND(E6<E5,E3<40000),E6,E5)))*E8*1.055*1.06,2)+10

I am not sure if EXCEL allows a HLOOKUP within an HLOOKUP. If not, how can I get around this?

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Jul 21, 2006

I was handed the attached file. understand everything except how the values in row 6 were derived No formula present when I received the file, just the numbers. Row 7 is hard entered scores the units achieved

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Feb 10, 2007

need an excel simple formula or function that returns values of y for given x in a two-dimensional array and works in the following way.actually a combination of linear interpolation and lookup/linear search. as in following example

x y

1 10

2 15

3 20

if x=1.5 then y=12.5 (answer available thru FORECAST but incomplete)

if x=2 then y=15 (answer available thru LOOKUP but incomplete)

so for whatever the x i need/get a valid y thru a single formula/method !

sorry m not good in math,

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Mar 29, 2013

I have to convert the first to the second program, but i don't know how to do this:

MAD.png

ABStolinear.xlsx: the first sheet is the first program which is correct (i think), the second sheet is a failed attempt to write the second program

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Feb 10, 2009

I have 3 equations and have created the relevant chart from them. What I would like to do is put in a value of x & y and get result z. Having done a search through previous threads I found some BiLinear Interpolation code that works using the table in a workbook, but what I'd really like is the Interpolation of the formulae rather than the resulting table and for it to be embedded in VBA.

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Jan 4, 2007

I am using the Forecast formula to give me a value from a Linear trend. However I need to limit the resulting value that is displayed within a min and max value. Background: This is to allow me to calculate the amount of bonus someone will earn depending on the Percentages of their target they achieve. The min bonus is 25% when 80% of target is achieved and max bonus is 100% when 125% or greater of target is achieved.

So the Forecast formular works great using the existing values, but i need help limiting the results to between 25% and 100%. I was trying to use a sumif formula to copy the resulting cell but only if the value fell between the 25 and 100%. I've attached the spreadsheet as I think it will highlight what i'm trying to do better than I can explain it.

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Oct 4, 2007

In the attached sheet, I have measured data from a device. It shows Input, Output, gain and delta. You can see as input increases, delta comes down. I want to find the output corresponding to delta od -1. In the table, I have enteries for delta of -0.982 then -1.382, not for -1. How to find output corresponding to delta of -1?

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Oct 9, 2008

I need a formula to calculate a linear sliding scale from 10%-30% (no higher, no lower). Based on the data in the below chart, if the GROR (let's say this is known and the result resides in cell A1) is less than or equal to 0.0% the payout % is 10.0% and gradually increases as the GROR increases.

The payout % is capped at 30% which is if GROR is 18% or greater. Below are just some examples of how certain thresholds should calculate.

GROR 0.0%5.0% 8.0% 11.0% 14.0% 18.0%+

payout %10.0%10.0%14.6%19.2%23.8%30.0%

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Jan 27, 2013

If I have a set of numbers 1,2,3,4,5,6,7,8,9 in cells, how can I get a line of best fit, linear regression, in the cells next to them?

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Nov 25, 2006

I have done quite a bit of looking on Google and looked over the posts in this forum, however, I can't find an example Excel worksheet for a linear weighted moving average.

The data set I am applying this to has 180 data points and the linear weights should extend back over the last 30 points.

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Mar 8, 2008

in this example below i need to work out what the divsor would be for values inbetween the data?

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Mar 20, 2008

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.

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May 5, 2014

I have set up a linear regression array in Excel and now want to test the significance of my r2 value at a certain level of significance. I've only been able to find tables that give the critical r value, but I want to test it at 99.73% level of confidence and none of them contain that specific value. Is there a way to do this in Excel?

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Mar 2, 2009

I have a set of data. I know how to do linear regression over the whole set of data. How do I have another linear regression over the first 5 points in the set of data on the same graph ?? I am using Excel 2007

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Nov 18, 2012

Writing a macro to run SOLVER on a linear program. I have twenty tabs, each with a linear program and a solver already set up (constraints, cells to change, and cell to maximize). I would like to run a sub that will solve each tab's LP by running the tab's SOLVER...

If it makes it easier, my cell to maximize is I17, by changing B16:H16, subject to I20:I40 SolverAdd -> SolverOk -> SolverSolve

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