1. May 3, 2009 #1

   Shukie

   

   I have a function of which I'm trying to determine the uncertainty. I'm using Mathematica and I can't get it to work. However, I don't see what I'm doing wrong. My uncertainty has the same value as the function itself, only a factor 10^7 higher. That is of course completely wrong, but I don't see where I'm going wrong. Could anyone please take a look?
   
   http://home.orange.nl/~kuip3148/Differentieermethode.nb [Broken]

    

   Last edited by a moderator: May 4, 2017

   Shukie, May 3, 2009
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3. May 22, 2009 #2

   Dale

   

   Insights Author

   Staff: Mentor

   Hi Shukie,
   
   This is probably a little late, but your formula for the propagation of errors is wrong. Each term should be of the form SDx²(df/dx)² where SDx is the standard deviation of x. You calculate the (df/dx)² part of each term but never use the SDx² part. Also, you forgot to square the one for R.

    

   Dale, May 22, 2009

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