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I just learned how to find the exponential function that approximates a dataset by taking the logarithm of the data points, doing a linear regression on that data, then working out the exponential equation from that.

This is very clever. Who invented this technique?

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    Clever perhaps, but often not a good idea. See for example http://en.wikipedia.org/wiki/Nonlinear_regression#Linearization or http://cscs.umich.edu/~crshalizi/weblog/491.html for some words of warning.2011-06-21

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