Displaying 1 result from an estimated 1 matches for "qudratric".
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quadratric
2003 Jan 20
1
quadratic trends and changes in slopes
...changes. Most papers in the literature
determine this by checking when it changes from being a linear trend to
a quadratric trend. i.e deviation from linearity is seen as evidence
that the second, slower process is used.
I'd like to test the ranges 1-2, 1-3, 1-4, 1-5, 1-6, etc and see when
a qudratric trend is significant. However, although I have read some
literature and done many google searches, I cannot figure out how to
do this with R. Can anyone show me a simple example of how to do
this. (Either with the method described above or with a different
method -- but please note that I only ha...