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From "Yang, Shuli" <>
Subject how to get the second ferivatives of a group of data
Date Wed, 24 Sep 2008 16:16:39 GMT
Here is the problem,

Function F(x) does not have a formula to specify the relation between x
and f(x), but for each x, I have got the value of f(x) by a measurement

I am interested in the point xi at which the second derivative of f(xi)
is zero. 

Can anybody help me how to do that?





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