Graph Non-linearity Calculation

Discussion in 'Math' started by thavamaran, Jul 2, 2009.

  1. thavamaran

    Thread Starter Active Member

    Feb 21, 2008
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    Hi guys, im currently undergoing process of my final engineering project. so im analyzing my sensor via graph. so i have attach two graph image whereby i need to compare the actual output which is in blue line and red line is the actual linearity graph which how it suppose to be. so now i need to find the drifting percentage between the actual graph and the linearity graph. i need idea how to do it, can anyone guide me through please. thank you.

    in second graph i have pointed out the drifted point from linearity form. please guide me through.
     
  2. studiot

    AAC Fanatic!

    Nov 9, 2007
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    Look at you maths notes (statistics section), or google, or ask your tutor about,

    'least squares analysis'
    'regression line analysis'
     
  3. thavamaran

    Thread Starter Active Member

    Feb 21, 2008
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    0
    Hey thanks man, it really helps, thanks
     
  4. studiot

    AAC Fanatic!

    Nov 9, 2007
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    If these are subjects you should know something about post what you are doing and we will help.
     
  5. Papabravo

    Expert

    Feb 24, 2006
    10,148
    1,791
    Check out the freeware package called `R'. It is specifically designed for doing this kind of statistical analysis. It does take an investment of time to become proficient in using it however. Once you do the gain in productivity is immense.

    http://www.r-project.org/
     
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