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Autocorrelation Function

i am trying to calculate the autocorrelation function of returns of a single stock.

any suggestions? ive calculated the daily returns but am stumped on what to do next. ive been messing with the CORREL function in excel but i havent been getting very far.

any comments would be appreciated!

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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.

Is there an Excel guru that can help with this - its related to "drop down menus"

I have 2 colombs of data.

AT the bottom of the first, I have created a drop down menu using the "data validation" feature in excel.

At the bottom of the second colomb, I have used an "IF" function that returns a result, which depends on what value is chosen from the drop down menu in colomb 1

The problem I have is that I want the TRUE result from the IF function to be another drop down menu, being the data in colomb 2.

How do you write an IF function where the TRUE result is a drop down menu??
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ANy suggestions??

I am trying to work out how to calculate the geometric mean of a series of values, some of which are negative, ie. investment returns over a series of years with some negatives.

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I have two columns of data: column A contains the date and time in the form dd/mm/yyyy. Column B contains a number value. All the times are in order, so column A looks like:


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Is there a function I can use to do this? I've been trying the AVERAGEIF formula but can't get it to work. Any ideas would be much appreciated!

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Need a formula to calculate weeks stock in hand based on 12 months forecast.

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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 have cells in a column, some colored yellow, some not. I am trying to use
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I also tried to use the CELL function's color feature, but I couldn't get it
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I have a sheet with a list of names on and I've noticed that when I use ctrl+F to use the find function, even when I know i have entered the correct name it still will not work. I have identifed times when I know the name is there on the sheet, but the find function says "Excel cannot find the data you are searching for"

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Good day... I need an IF Function that will allow me to action a time in a time range:

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Hi Everybody,

First post on the forum, have only recently joined and im hoping that someone can help me before my head explodes!

I am trying to prepare a simple Material Quantity List for some Steel materials.
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Does anybody know of a formula for this. I have been trying to use the IF function and getting absolutely nowhere, all suggestions will be highly appreciated!!

This is probably an easy question for most of you, but it's killing me. I tried searching before I posted this, but the suggestions given didn't seem to work for me.

I need to look up data from a cell on one Excel sheet, compare it to a list on a 2nd sheet and when they equal, take a value from a different column on the 2nd sheet and drop it back on the 1st sheet. Since that's a horrible explanation, let me try explaining it this way:

Sheet 1
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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!!

Hi there

I am trying to calculate our On Time Delivery. I want this as a simple percentage of jobs. I have got this running in the following way:

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Any help much appreciated



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I am using the code below to disable the save function very successafully. However, is there a work around to allow a macro to save?
Private Sub Workbook_BeforeSave(ByVal SaveAsUI As Boolean, Cancel As Boolean)

'this disables the save function on the XLS

MsgBox "****Save is Disabled****"
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Cancel = True
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End Sub

Is it possible to have numbers added to the same cell and have excel continue
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8 in cell d2 and I want to add the number 8 to that cell and have excel add
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Im working with a large data spreadsheet that has Yes and No answers in different columns. There are blanks within the selection too.
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Please HELP!!!