Close Window   
Free Ebook
Get Your Free Excel
ebook!
Our Top 15 Excel Tutorials
Instant Access!
E-mail:
Excel Forum

Finding X-axis Intercept

Forum Register
Search Excel Forum Posts, Tutorials, Macros, Tips, and More

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.

View Answers     

Similar Excel Tutorials

Make Y Axis Start at 0 in Charts in Excel
How to make the Y axis start at 0 in charts in Excel. This is a simple formatting issue. Select the Chart and go to ...
Change Axis Units on Charts in Excel
You can change the size of the units on a chart axis, their interval, where they start, where they finish, and mor ...
Combine Multiple Chart Types in Excel to Make Powerful Charts
In this tutorial I am going to show you how to combine multiple chart types to create a single chart in Excel. This ...
Changing Any Element in a Chart in Excel
In this tutorial I am going to go through the Layout tab in more detail and show you how to build up chart layouts ...
Thermometer Chart in Excel
How to create a thermometer chart in Excel. This is what we want: Steps to Create a Thermometer Chart in Excel Mak ...
Format Any Element of a Chart in Excel
In this tutorial I am going to go through the Format tab in more detail and show you how to Format every element of ...

Helpful Excel Macros

Replace Formulas with Values (For The Entire Workbook)
- This macro will convert every formula in an entire workbook into its respective value. This is basically a quick way to
Vlookup Macro to Return All Matching Results from a Sheet in Excel
- This Excel Macro works like a better Vlookup function because it returns ALL of the matching results. Run the
Vlookup Function That Searches The Entire Workbook - UDF
- This UDF is a Vlookup function that searches the entire workbook in Excel. The syntax and usage of the function is exac
Get Values from a Chart
- This macro will pull the values from a chart in excel and list those values on another spreadsheet. This will get the s
Get the Number(s) Out of a Cell that Contains Both Text and Numbers in Excel - UDF
- This free Excel UDF allows you to get the numbers out of a cell that contain both text and numbers. This is a great fun

Similar Topics







Hi there. I know it sound like a really simple thing but its really stumped me.

Instead of the y axis being on the left hand side, i wish for it to cut at 0,0. I have positive and negative values and I need it to be in the centre instead of on the left.

I have tried formatting both the axis and it would appear that the x axis already cuts the y axis in the right posistion so i need to format the x axis to make the y axis cut it at 0,0. I have already tried typing in 0 instead of 1 and it keeps saying it need to be number more than or equal to 1.

Any help would be greatly appreciated.

Nicole


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.

The Geomean function doesn't work because it only uses positive numbers.

Any help would be greatly appreciated.


Hi folks,

Hoping someone can help me quickly as I'm pulling my hair out and have a deadline getting too close.

Been trailing the net and this board but can't work out how to do a simple variance.

How do I work out the difference between two numbers - including negatives.

If the numbers are all positive, it's fine as it's simply a case of A - B = C which is your difference. However, that doesn't work if B is negative.

I need a formula that would give the following:

First Number / Second Number / Difference
1 / 5 / 4
1 / -5 / -6
-1 / 5 / 6
-1 / -5 / -4
-5 / -1 / 4

Hopefully there's a simple function I've been missing.

Thanks in advance, R


This may be less of an Excel question than a general data display question, but I'll try here.

I have 3 variables that I'm charting. I have one on the primary axis and it's values are in the billions. I have one on the secondary axis and it's a percentage. I need to display a 3rd who's value is in the millions. If I put it on the primary axis, you cannot see modest changes.

Is there a tricky way to get all three on one graph? I know I could split on two graphs, so that's my backup plan.

Thanks,

Dave


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"

Im unable to put any pics up as my work pc has java disable so photobucket ect won't work but has anyone else come across this problem and how did you rectify it? A search macro perhaps?


Hey

I have three columns containing last name values from 3 different sources that I've brought into one sheet. I am trying to find a way to compare all three values to establish if they are the same.

Of the three values there is no master, Each value may be different. So essentially it would be like doing =IF(a1=a2=a3,"match", "nomatch")
But of course this isn't possible.

I don't care about obtaining detail about which value matches which. I just need true or false response as to whether all three values are the same or not.

Thanks for any help anyone can provide.

Aaz


I have cells in a column, some colored yellow, some not. I am trying to use
the SUMIF function to sum only the cells in the range that are colored. Can
this be done? Can I enter something in the "criteria" part of the formula
that can do this?

=SUMIF(D3:D13,"criteria",D3:D13)

I also tried to use the CELL function's color feature, but I couldn't get it
to work right. I don't know how to get Excel to recognize if a cell is
colored in a formula.
=CELL("color",cell)

It might just be that I don't know what this means in Help:

"color" --> 1 if the cell is formatted in color for negative values;
otherwise returns 0 (zero).

Can anyone help?



Hi there. I'm using Excel 2007 and often use filters to find inconsistent data (mis-spellings, etc.) and then clean up the data using the fill handle to fill in correctly formatted values. I'm finding that, with a simple filter on, dragging over cells hidden by the filter changes the values in the hidden cells too. This is something I don't remember from my last version of Excel. I'm wondering if I've mis-remembered how this control works, or if there is a setting I can't find.

My goal is to drag and fill (or paste) in a colum with a range of rows wiht some hidden (filtered out) rows, and have the filtered out data be unaffected, if that makes sense.

Thanks!

T


Hi-

I am brand new to Mr. Excel and would love some advice.

I searched the boards pretty extensively but could not find what I am looking for...I apologize if this is a duplicate.

I am using Excel 2007

How do you automatically add rows and update values for cells to a linked worksheet in which rows have been added? For example: Sheet 1, columns A & B are linked to Sheet 2, columns A & B. Sheet 2 has values in A1:A5 & B1:B5 and Sheet 1, since it is linked, has the same info. I want to add a row in between 3 & 4 on Sheet 2 and want Sheet 1 to automatically add the same row and update the value of the cell in column A & B.

Any help is greatly appreciated!

John



Column 1 has roughly 20 rows of information. Cell C1 has the formula =A1.

Is there a formula so that when I drag C1 horizontally into D1, E1, F1, ..., the values placed in each cell will be =A2, =A3, =A4, ...

I do not want to transpose the values from column 1 into C1, D1,.... I want these cells to have a formula that links them up to column 1's values

Thanks

Hi Everyone,
I have searched online and in help but can't seem to find the best solution...

I have values like 00904BB303D6 that need to become: 00:90:4B:B3:03:D6 (the value is always 12 digits, and the : needs to appear every two digits.) Is there a formula that can easily do this for me? Your suggestions are greatly appreciated!

Thanks in advance!!!!


Hi all,

I have several accumulated values from other spreadsheets on my spreadsheet and I'm combining and organizing them on mine. However, the cell alignment isn't working properly as you can see in the picture below.



Now, I can certainly retype these values and align them and they'll align all nice and neat; however, I have a huge Column and retyping that column would take an inordinate amount of time.

I searched earlier on cell alignment and couldn't find anything. Any help is appreciated.

Sincerely,
Bill


Hey everyone,

I'm really hoping someone can help me with this...

I need to plot percentages over time in a line graph in excel. I don't want to have to do a percentage equation in the spreadsheet, I just want excel to take two sets of values and display the percentage in the chart. For example, I need B1 as a percentage of B2 for week 1, C1 as a percentage of C2 for week 2, etc....
Can someone please offer a suggestion for how to do this? I would really appreciate it.
Also, would it be possible to link data from other sheets in the workbook into one single chart?


Regarding Charts in Excel:

Is there a way to have the Min and Max values adjusted dynamically for the Scale of the values being displayed ??

I know that I can use named ranges to display various sections of data -- month by month, or quarter by quarter, for example.

But when the value of these ranges vary greatly from section to section I end of having to manually go and adjust the Min and Max values of the chart scale.

For example, if I was looking at a graph of the S&P 500's prices last November, a Min and Max range of 750 to 1200 would be fine. But if I had a dynamic range established and scrolled over to view the S&P 500's prices for this past February, I would need a Min and Max range of around 650 to 850.

Is there a way to have these Min & Max values adjust automatically depending on the values being displayed ??

Thanks

StanSz


Entering time values in custom format [h]:mm:ss
Cells accept hours over 23,
Adding cells in column returns correct total time.
Have not found a way to multiply these cells by a $ hourly rate.
So use HOUR(cell ref) and MINUTE(cell ref) to capture values in referenced
cell - then use these values to calculate total payment for $rate per hour.
However, the HOUR(cell ref) formula returns the hours in excess of 24 when
the cell contains an hour value in excess of 23 (ie 27 hours returns 3).




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.




Hi,

Try this...

There are some valid datas in the cells A2 (Eg. 100), B2(Eg. 200), C2 and D2.
Data validation is used in cell K2 to limit it to a set of values.

Can we implement this formula?

IF(K2="Approved")
{
A2=A3; B2=B3; C2=C3; D2=D3; K2=K3;
}
ELSE
{
no change to any values.
}

Thanks in advance...


I need to find data in two different formats within a column

Examples

Webb Christopher


Greer Nancy

I need to find cells with text that have more than one space between the first and last names; and cells with text that have only one space between the first and last names.

I am fairly new to excel. I can find the space after the first word but cannot tell it to find ones that say have a space then another string of text.

Thank you for your help!



Hello,

I am new to using Excel and I am not very computer literate. I am looking for some help with a spreadsheet I am making. Here is the problem:

I have a column of 14 numbers in cells A1 to A14. If all of these values are less than 2%, I would like a "Pass" to display in cell B1. If any of these values are greater than 2% I would like a "Fail" to display in cell B1.

I have got a formula that works for a single cell but I can't figure out how to get it to apply to more than one cell. For example, I have entered =IF(A1<2,"Pass","Fail") in cell B1. Now if the value I enter in A1 is less than 2, it shows a "Pass", and if the value in A1 is greater than 2 it shows a "Fail" in cell B1. How can I get this to apply to all of the cells from A1 to A14?

If somebody could help me out that would be great.

Thanks,
Randy


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****"
' Following line will prevent all saving
Cancel = True
' Following line will prevent the Save As Dialog box from showing
If SaveAsUI Then SaveAsUI = False
End Sub


Hi all,

I'm looking for help in building a formula which will sort numbers into different "buckets". My spreadsheet has a range of values in column B. These values can range anywhere from -100,000,000 to +10,000,000. I'd like to be able to sort them into the following buckets:-


I have looked over the forums for information on how to do this, and can not find anything. I have used conditional formatting to identify duplicates in my spreadsheet. I have a unique user ID, which combines the first and last name fields into one. However, in 10,000 there are a number of John Smiths, Joe Adams, etc. With smaller lists, we search manually, and then add a 1, 2, 3, etc to each duplicate to create a unique value for the User ID.

My question is:

Is there a way to check for duplicates, and then automatically add numbers to the duplicate values to make them unique? If so, how can this be done?

So that you will have this:

JohnSmith
JohnSmith2
JohnSmith3
JaneDoe
JaneDoe2
JohnAdams
JohnAdams2
JohnAdams3
JohnAdams4

I think I have done a good job in illustrating what I would like to be able to do, but if there is still something that is unclear, I will post whatever clarification is needed.

Thank you in advance for your help!!


Hi,

I have a column with a set of duplicate values. I need to remove the duplicates while leaving the original data and keeping the blanks. The Remove Duplicates function comprises the data and this does not work for me. Help!


I have a set of data about with approx 7500 cells all contained in one column. The data has a series of peaks that happen, and I need to identify each peak value and place it in a cell. The peak does not occur at regular intervals but they are somewhat regular, as in within 130-230 data points. So, if one could find the first peak in the first 200 cells, identify it and store it somewhere, then look in the next 200, store it, etc. I don't know how to do that in excel. Please help

Thanks
Jon


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??
I tried to create a drop down menu of colomb2 elsewhere in the spread sheet, and used that cells location as the TRUE value, but this didn't work either...

ANy suggestions??