Forecasting Using Linear Regression |
Forecasting Using Linear Regression - Excel |
|
Hi - I'm struggling with the math\function used in linear regression forecasting in Excel.
I have 8 qtrs of revenue (8 columns). I want to use linear regression to forecast into the next 8 qtrs (ending with 16 columns total - 8 actual, 8 forecast). Is there a, excel formulas I can use.
For simplicity, let's assume the data is in row 4...the actuals are in b through I and I want to forecast into J through Q.
Thanks!
alyssa
I have 8 qtrs of revenue (8 columns). I want to use linear regression to forecast into the next 8 qtrs (ending with 16 columns total - 8 actual, 8 forecast). Is there a, excel formulas I can use.
For simplicity, let's assume the data is in row 4...the actuals are in b through I and I want to forecast into J through Q.
Thanks!
alyssa
Excel VBA Course - From Beginner to Expert
200+ Video Lessons 50+ Hours of Instruction 200+ Excel Guides
Become a master of VBA and Macros in Excel and learn how to automate all of your tasks in Excel with this online course. (No VBA experience required.)
(80% Discount Ends Soon!)
Similar Topics
So I've got some data, which has the approximate form of a sine function. I want to find all the x-axis intercepts. I tried using the intercept function and swapping around the y values for the x values, but it only returns 1 value (so I'd guess it uses a linear regression to estimate a single line through the axis).
I was thinking of trying a nested if/and statement but I haven't quite figured out how to do it. Basically I want to identify the two values where it switches from positive to negative and also indentify the values where it goes negative to positive, I can then fit a straight line between them to find a better approximation of the intercept (though it might not be necessary). Preferably I'd like it all one function as I'm not doing it in VBA (I might do later though, we'll see).
Can anyone suggest how I'd find these value or the x-intercept. Any help would be greatly appreciated.
I was thinking of trying a nested if/and statement but I haven't quite figured out how to do it. Basically I want to identify the two values where it switches from positive to negative and also indentify the values where it goes negative to positive, I can then fit a straight line between them to find a better approximation of the intercept (though it might not be necessary). Preferably I'd like it all one function as I'm not doing it in VBA (I might do later though, we'll see).
Can anyone suggest how I'd find these value or the x-intercept. Any help would be greatly appreciated.
Need a formula to calculate weeks stock in hand based on 12 months forecast.
Here is the example.
Jan2011 Feb2011 Mar2011 Apr2011 May2011 Jun2011 Jul2011 Aug2011 Sep2011 Oct2011 Nov2011 Dec2011 ----------- ----------- ----------- ----------- ----------- ----------- ----------- ----------- ----------- ----------- ----------- ----------- Product XXXXX Actual/Forecast : 174 1674 574 574 524 524 524 524 524 728 728 728 New Purchases : 0 0 0 0 1002 0 0 0 0 0 0 0 Goods In Transit: 0 1506 0 0 0 0 0 0 0 0 0 0 Other Movements : 0 0 0 0 0 0 0 0 0 0 0 0 Closing Stock : 1270 1102 528 -46 432 -92 -616 -1140 -1664 -2392 -3120 -3848 Week Stock in Hand ? ? ? ? ? ? ? ? ? ? ? ?
So, in Month of Jan2011 the Closing stock is 1270, need a formula to calculate how many weeks will this stock cover look at future forecast.
Here is the example.
Jan2011 Feb2011 Mar2011 Apr2011 May2011 Jun2011 Jul2011 Aug2011 Sep2011 Oct2011 Nov2011 Dec2011 ----------- ----------- ----------- ----------- ----------- ----------- ----------- ----------- ----------- ----------- ----------- ----------- Product XXXXX Actual/Forecast : 174 1674 574 574 524 524 524 524 524 728 728 728 New Purchases : 0 0 0 0 1002 0 0 0 0 0 0 0 Goods In Transit: 0 1506 0 0 0 0 0 0 0 0 0 0 Other Movements : 0 0 0 0 0 0 0 0 0 0 0 0 Closing Stock : 1270 1102 528 -46 432 -92 -616 -1140 -1664 -2392 -3120 -3848 Week Stock in Hand ? ? ? ? ? ? ? ? ? ? ? ?
So, in Month of Jan2011 the Closing stock is 1270, need a formula to calculate how many weeks will this stock cover look at future forecast.
I see a formula that our Human Resources Department is using to annualize voluntary turnover.
It looks like this:
=(E3/((A3+D3)/2))*12/months
So if I substitute with some actual data:
=(6/((22+33)/2))*12/months the answer becomes 21.8% (as the annualized voluntary turnover rate).
What does the *12/months actually do mathematically? I cannot find it in the excel help files and have not been able to figure this out using math (on the calculator).
It looks like this:
=(E3/((A3+D3)/2))*12/months
So if I substitute with some actual data:
=(6/((22+33)/2))*12/months the answer becomes 21.8% (as the annualized voluntary turnover rate).
What does the *12/months actually do mathematically? I cannot find it in the excel help files and have not been able to figure this out using math (on the calculator).
I use Excel 2000 (9.0.2720)
In range A1:D10, I have entered the figures in actuals (e.g. 34532642.45,
78945624.89 etc.). How can I convert those figures in Lakhs / Thousands /
Crores? Before converting, Can Excel 2000 prompt me for conversion in Lacs /
Thousands / Crores?
In range A1:D10, I have entered the figures in actuals (e.g. 34532642.45,
78945624.89 etc.). How can I convert those figures in Lakhs / Thousands /
Crores? Before converting, Can Excel 2000 prompt me for conversion in Lacs /
Thousands / Crores?
Hey all,
Coffee hasn't hit my brain yet this morning and I cant figure this one out.
I have a list of names that are in the following format:
LastName Suffix, FirstName MI
The middle initial is not always present, neither is the suffix. For simplicity purposes, we will assume the suffix can ONLY be "Jr."
Here is some sample data:
Brown Jr., Wayne
Fowler, Michael
Parker, David A
Winstead Jr., Johnny N
I want the output to be the following:
Brown, Wayne
Fowler, Michael
Parker, David
Winstead, Johnny
Thanks in advance for the help!
PS (if i can get a formula that at least gets rid of the middle initial at the end (if it exists), then that would be a HUGE step in the right direction, as the Jr. only occurs on maybe 3% of my data. The middle initial is in about 80% of the data.
Coffee hasn't hit my brain yet this morning and I cant figure this one out.
I have a list of names that are in the following format:
LastName Suffix, FirstName MI
The middle initial is not always present, neither is the suffix. For simplicity purposes, we will assume the suffix can ONLY be "Jr."
Here is some sample data:
Brown Jr., Wayne
Fowler, Michael
Parker, David A
Winstead Jr., Johnny N
I want the output to be the following:
Brown, Wayne
Fowler, Michael
Parker, David
Winstead, Johnny
Thanks in advance for the help!
PS (if i can get a formula that at least gets rid of the middle initial at the end (if it exists), then that would be a HUGE step in the right direction, as the Jr. only occurs on maybe 3% of my data. The middle initial is in about 80% of the data.
Hi peeps
I want to combine data from several worksheets into one worksheet.
For example, I have data in Sheet1 (Columns A,B,C), data in Sheet2 (Columns A,B,C), data in Sheet3 (Columns A,B,C) all with varying amounts of rows. (All the rows contain text data).
I need to combine all of the data from the 3 sheets into a single sheet, Sheet4 (Columns A,B,C), eliminating the empty rows.
I've been looking into this for a while, and can't find anything that really helps. Anyone got any pointers of what to look into?
Any help will be beautiful.
Cheers
I want to combine data from several worksheets into one worksheet.
For example, I have data in Sheet1 (Columns A,B,C), data in Sheet2 (Columns A,B,C), data in Sheet3 (Columns A,B,C) all with varying amounts of rows. (All the rows contain text data).
I need to combine all of the data from the 3 sheets into a single sheet, Sheet4 (Columns A,B,C), eliminating the empty rows.
I've been looking into this for a while, and can't find anything that really helps. Anyone got any pointers of what to look into?
Any help will be beautiful.
Cheers
I have a spreadsheet with simple (addition/subtraction) formulas. The file is quite large and the formulas are too. All of a sudden, the formulas stopped working except when I double click in the cell containing the actual formula. For example, if I enter "2" in each cell, A2 and B2, cell B3 should reflect "4" because there is a formula in cell B3 which totals cells A2 and B2. Only by double clicking on cell B3 will the program actually calculate. I'm totally perplexed and so is my IT contact. Anyone?
A previous poster explained what I also need; there were no responses,
so I thought I would try again.
Does anyone know of an Excel template--or a small stand-alone
program--that will calculate the interest/principal breakdown when
payments are varied in amount and frequency? Free or low-cost, please.
I need one that will work on my Mac/Office 2004. I will need to print
out periodic reports.
Here is the way the previous poster described it:
"Excel template: Loan Amortization for random/irregular payments,
figures days
between payment dates.
I have a loan with a variable beginning balance and irregular payments
with
annual large payment. (based on collections)
Would like to enter payment and date.
then Excel would figure days since last payment, interest amount,
principal
amount, Ending Principal balance.
And total interest paid, total pricipal paid
If I change the starting principal, excel would recalculate all
entries."
Thanks very much.
so I thought I would try again.
Does anyone know of an Excel template--or a small stand-alone
program--that will calculate the interest/principal breakdown when
payments are varied in amount and frequency? Free or low-cost, please.
I need one that will work on my Mac/Office 2004. I will need to print
out periodic reports.
Here is the way the previous poster described it:
"Excel template: Loan Amortization for random/irregular payments,
figures days
between payment dates.
I have a loan with a variable beginning balance and irregular payments
with
annual large payment. (based on collections)
Would like to enter payment and date.
then Excel would figure days since last payment, interest amount,
principal
amount, Ending Principal balance.
And total interest paid, total pricipal paid
If I change the starting principal, excel would recalculate all
entries."
Thanks very much.
Hi,
I made a simple worksheet that we have been manually entering the time for employees, but there are too many errors (even with simple math). Can someone help me convert the time of ex: written 8-4:30 or 10-3 (meaning 8:00am to 4:30pm) where you have the total weekly hours? Right now I have a column for overtime. Is there a way to automatically calculate the over time also? The work day is 8-4:30 with a half hour lunch (lunch is not calculated into the hours, so you minus a half hour). 8-4:30 equals 8 hours. So, if a person works 8am to 6:30pm, how can I set it up where in the first row of time, I will type in 8-6:30pm. In the totals column to the far right, it will display 8 hours. In the (O.T.) column, it will display 2 hours.
This way, when I call in my payroll, I will have the total "regular" hours in one row and underneath, I will have the total overtime hours.
Or... does anyone have a better solution to keeping track of their hours?
Thanks!
Marty
I made a simple worksheet that we have been manually entering the time for employees, but there are too many errors (even with simple math). Can someone help me convert the time of ex: written 8-4:30 or 10-3 (meaning 8:00am to 4:30pm) where you have the total weekly hours? Right now I have a column for overtime. Is there a way to automatically calculate the over time also? The work day is 8-4:30 with a half hour lunch (lunch is not calculated into the hours, so you minus a half hour). 8-4:30 equals 8 hours. So, if a person works 8am to 6:30pm, how can I set it up where in the first row of time, I will type in 8-6:30pm. In the totals column to the far right, it will display 8 hours. In the (O.T.) column, it will display 2 hours.
This way, when I call in my payroll, I will have the total "regular" hours in one row and underneath, I will have the total overtime hours.
Or... does anyone have a better solution to keeping track of their hours?
Thanks!
Marty
Hi,
Can someone please help? I've got quite a lot of data that I want to sort
by the persons date of birth, but because I have cells with formula in it
(this works out the persons age) the sort function is changing the formulas
so the formulas no longer work becuase it changes the cell where it is
getting the data from. Does anyone have any ideas how this could be fixed??
Thanks!
Can someone please help? I've got quite a lot of data that I want to sort
by the persons date of birth, but because I have cells with formula in it
(this works out the persons age) the sort function is changing the formulas
so the formulas no longer work becuase it changes the cell where it is
getting the data from. Does anyone have any ideas how this could be fixed??
Thanks!
I'm attempting to filter columns E, G, and I all at the same time. I need to
display rows that have values greater than 0 in any one of those three
columns. So far I can only filter progressively. If I filter column E and
then filter column G, the second filter is only applied to the results of the
first filter.
Does anybody know if it's even possible to do what I'm trying to do?
display rows that have values greater than 0 in any one of those three
columns. So far I can only filter progressively. If I filter column E and
then filter column G, the second filter is only applied to the results of the
first filter.
Does anybody know if it's even possible to do what I'm trying to do?
How do I calculate the number of batches per hour? Here's what I have so far:
Cell B5: start time: 4:15 formatted as 4:15:00 am
Cell B6: finish time: 6:15 formatted as 6:15:00 am
Cell B7: total time: 2:00 formula in cell: =TEXT(B6-B5,"h:mm")
Cell B8: total batches processed: 22 (this is entered manually)
Cell B9: batches per hour: formula in cell: =B8/TEXT(B7,"h")
as long as I have this formula in cell B9 the answer comes out correct which should be 11 per hour.
If the formula in B9 is B8/B7, the answer is 264.0, Is this because of the way excel is reading the total time or the total time is formatted as a time, not an actual number? Is this the correct way to solve the problem?
answer should be 11 per hour.
Cell B5: start time: 4:15 formatted as 4:15:00 am
Cell B6: finish time: 6:15 formatted as 6:15:00 am
Cell B7: total time: 2:00 formula in cell: =TEXT(B6-B5,"h:mm")
Cell B8: total batches processed: 22 (this is entered manually)
Cell B9: batches per hour: formula in cell: =B8/TEXT(B7,"h")
as long as I have this formula in cell B9 the answer comes out correct which should be 11 per hour.
If the formula in B9 is B8/B7, the answer is 264.0, Is this because of the way excel is reading the total time or the total time is formatted as a time, not an actual number? Is this the correct way to solve the problem?
answer should be 11 per hour.
Hi,
I made a budget with many narrow columns and have turned the data into a table. I will only ever filter the data with the left-hand most column. However, all the other columns are filled each with the grey drop-down filter arrow button, and I can no longer see the headings of these columns and frankly seeing 50 little unused arrow buttons is rather ugly. Is there any way to simply remove the filter drop-down buttons on some columns or even all of them, just leaving a filter button at the heading of the first column? I know I can hide the headings, but then I lose sight of the first filter arrow that I use.
Sorry to ask such a bizarre question, but I appreciate your help.
Thanks
I made a budget with many narrow columns and have turned the data into a table. I will only ever filter the data with the left-hand most column. However, all the other columns are filled each with the grey drop-down filter arrow button, and I can no longer see the headings of these columns and frankly seeing 50 little unused arrow buttons is rather ugly. Is there any way to simply remove the filter drop-down buttons on some columns or even all of them, just leaving a filter button at the heading of the first column? I know I can hide the headings, but then I lose sight of the first filter arrow that I use.
Sorry to ask such a bizarre question, but I appreciate your help.
Thanks
Hi There
Im trying to Sum the total of a number of cells using the following formula:
=SUM(F57,H57,J57,L57,P57,N57,D57,,R57,V57,T57,X57)
however some of those cells might be blanks as they are dependant on other data. The probelm im having is that when they are blank i am getting the the sum as 0. i know this isnt the case but dont know how to rectify my code.
Im trying to Sum the total of a number of cells using the following formula:
=SUM(F57,H57,J57,L57,P57,N57,D57,,R57,V57,T57,X57)
however some of those cells might be blanks as they are dependant on other data. The probelm im having is that when they are blank i am getting the the sum as 0. i know this isnt the case but dont know how to rectify my code.
I'm unable to group/ungroup rows or columns on an excel worksheet that was
emailed to me by a co-worker. It's an existing file so I don't know what
restrictions were placed on the workbook. What can I do to fix this problem?
emailed to me by a co-worker. It's an existing file so I don't know what
restrictions were placed on the workbook. What can I do to fix this problem?
Hello, please help me out with this one.
So I am at work workin on this report and I need a function that will make Excel automatically insert the today's date in a cell (let's say D90) when I fill the content of another cell (for example C90) and the that will be inserted will never change. I tried to use the =TODAY( ) function but it keeps updating the date in the cell to the current date if i reopen the worksheet 2 days later. I need the cell to keep in the cell the date of the day when I filled in the content of cell C90 and do not updated it every time i open the document to the actual date.. Thanks in advance!!
So I am at work workin on this report and I need a function that will make Excel automatically insert the today's date in a cell (let's say D90) when I fill the content of another cell (for example C90) and the that will be inserted will never change. I tried to use the =TODAY( ) function but it keeps updating the date in the cell to the current date if i reopen the worksheet 2 days later. I need the cell to keep in the cell the date of the day when I filled in the content of cell C90 and do not updated it every time i open the document to the actual date.. Thanks in advance!!
I would like to copy a small table from Word into one cell in an Excel
worksheet. The first column of the table is a list of numbers. I tried
converting the table into text with manual line breaks and tab stops to
divide columns and rows, but that didn't solve my problem.
Excel pastes the data into several rows. When I try to merge them, I
get a warning that the selection contains multiple data values, and
merging into one cell keeps the upper-left most data only.
What I tried that didn't work:
* Formatting the Excel cells as text before pasting the data.
* The various options for "Paste Special." The closest I got was
inserting the table as a Document Object, which could be a workaround,
I guess.
What I am saving for when all else fails:
* The obvious solution of copying row by row into one Excel cell.
The data in the table is information about my dad's medications. I
would like to have reference charts of how to identify the strength of
each tablet by its color and markings. I got the info from the
manufacturers' websites and entered it into tables in Word, which I
would like to copy into a more comprehensive file I am creating in
Excel. The first column of each table is the strength of the tablet,
entered as 1 mg., 2 mg., etc. The subsequent columns describe the
shape, color, and markings. There are 3 tables, each with about 4-5
rows.
Is there a way to copy each one - whether as a table or as text - into
a single Excel cell without losing data?
Many thanks.
worksheet. The first column of the table is a list of numbers. I tried
converting the table into text with manual line breaks and tab stops to
divide columns and rows, but that didn't solve my problem.
Excel pastes the data into several rows. When I try to merge them, I
get a warning that the selection contains multiple data values, and
merging into one cell keeps the upper-left most data only.
What I tried that didn't work:
* Formatting the Excel cells as text before pasting the data.
* The various options for "Paste Special." The closest I got was
inserting the table as a Document Object, which could be a workaround,
I guess.
What I am saving for when all else fails:
* The obvious solution of copying row by row into one Excel cell.
The data in the table is information about my dad's medications. I
would like to have reference charts of how to identify the strength of
each tablet by its color and markings. I got the info from the
manufacturers' websites and entered it into tables in Word, which I
would like to copy into a more comprehensive file I am creating in
Excel. The first column of each table is the strength of the tablet,
entered as 1 mg., 2 mg., etc. The subsequent columns describe the
shape, color, and markings. There are 3 tables, each with about 4-5
rows.
Is there a way to copy each one - whether as a table or as text - into
a single Excel cell without losing data?
Many thanks.
How can I make a cell or the font of the cell flash or blink? I assume that
it is a function of conditional formatting. I know it is possible because I
have seen it before but I do not know how to do it.
it is a function of conditional formatting. I know it is possible because I
have seen it before but I do not know how to do it.
How do I restrict what I see on my screen (and specifically, limit the scroll
feature) to the rows and columns I'm actually using in an Excel 2003 Pro
spreadsheet?
feature) to the rows and columns I'm actually using in an Excel 2003 Pro
spreadsheet?
Hi
In excel i have a sheet open with about 30 columns in it. I try to use the scroll bar to move to the right and nothing happens apart from the scroll bar moves along. If i use the right button on the keyboard the scroll bar moves but i cannot see the columns I want. I cannot see anything that would of caused this.
Can anyone help?
Thanks
In excel i have a sheet open with about 30 columns in it. I try to use the scroll bar to move to the right and nothing happens apart from the scroll bar moves along. If i use the right button on the keyboard the scroll bar moves but i cannot see the columns I want. I cannot see anything that would of caused this.
Can anyone help?
Thanks