+ Reply to Thread
Results 1 to 4 of 4

Can you use Excel to automatically calculate the area between two charts?

  1. #1
    Registered User
    Join Date
    09-30-2012
    Location
    Tel-Aviv
    MS-Off Ver
    Excel 2010
    Posts
    84

    Can you use Excel to automatically calculate the area between two charts?

    I couldn't find anything helpful online amongst quite a few articles...
    I have Excel 2013.

    Please find attached a sample fileDummy for area between charts.xlsx

    Thanks in advance for any help!

  2. #2
    Valued Forum Contributor
    Join Date
    01-25-2011
    Location
    Belgium, Alveringem
    MS-Off Ver
    Excel 2003, 2007, 365
    Posts
    1,192

    Re: Can you use Excel to automatically calculate the area between two charts?

    perhaps i didn't understand your question 100%
    Attached Files Attached Files

  3. #3
    Registered User
    Join Date
    09-30-2012
    Location
    Tel-Aviv
    MS-Off Ver
    Excel 2010
    Posts
    84

    Re: Can you use Excel to automatically calculate the area between two charts?

    Hi,
    thanks for answering.
    This is what I meant area between.png
    I want to know the area in green...

    thanks!

  4. #4
    Forum Guru
    Join Date
    04-13-2005
    Location
    North America
    MS-Off Ver
    2002/XP and 2007
    Posts
    14,892

    Re: Can you use Excel to automatically calculate the area between two charts?

    As with a lot of questions, I find it is easiest to program a problem into Excel if I first understand the math behind the problem.

    I don't know how far back this will be taking you, but I expect that somewhere in your early education, you learned some basic geometry, including how to find the area of various quadrilaterals (squares, rectangles, parallelograms, trapezoids, etc.). If we can figure out how to reduce the area between these curves into a shape that we can calculate the area, we can then program that into Excel.

    It just so happens that, since x is the same for each point in the table, each interval in the table describes a trapezoid, for which we all should have learned way back when how to find the area (refresher if you need it: http://www.mathopenref.com/trapezoidarea.html) A=h*(b1+b2)/2. In your table h for each interval will be the difference between the two x points for that interval (h=x2-x1). The length of the two bases will be the difference between A and B (b1=B1-A1, b2=B2-A2).

    I would probably perform this calculation in Excel in several steps (to make the formulas simple and make it easy to debug):

    In row 7: B7=C3-B3 copied across. this will compute h for each interval
    In row 8: B8=B5-B4 copied across. this will compute b1 for each interval
    In row 9: B9=C5-C4 copied across. this will compute b2 for each interval
    In row 10: B10=B7*(B8+B9)/2 copied across. this will compute the area of each trapezoid in each interval
    In some convenient cell: =sum(B10:M10)

    Note that this will give a signed area for each interval: negative when B is less than A and positive when A is less than B. If you need to ignore these signs, you can use the ABS() function force all areas to be positive.
    Last edited by MrShorty; 12-22-2013 at 12:00 PM.
    Quote Originally Posted by shg
    Mathematics is the native language of the natural world. Just trying to become literate.

+ Reply to Thread

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Rollover Problem in Excel 2010 for Area Charts
    By EnergyGirl in forum Excel Charting & Pivots
    Replies: 0
    Last Post: 02-25-2013, 04:57 PM
  2. [SOLVED] Shaded Area in Lieu of Excel Charts
    By kansaskannan@gmail.com in forum Excel General
    Replies: 2
    Last Post: 08-22-2006, 11:00 AM
  3. [SOLVED] How do I calculate the area under the curve using Excel?
    By munster909 in forum Excel Formulas & Functions
    Replies: 1
    Last Post: 09-06-2005, 12:05 AM
  4. [SOLVED] Gridlines on Area/Stacked Area charts
    By AgileDarrell in forum Excel Charting & Pivots
    Replies: 1
    Last Post: 08-05-2005, 08:05 PM
  5. Can Excel calculate area for 3-D surface charts?
    By RAH in forum Excel Charting & Pivots
    Replies: 2
    Last Post: 03-20-2005, 12:06 AM

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts

Search Engine Friendly URLs by vBSEO 3.6.0 RC 1