Re: [R] Optimization problem

From: José E. Lozano <>
Date: Fri, 18 Jun 2010 08:48:14 +0200

> How about smoothing the percentages, and then take the second derrivative
to find the inflection point?
> which.max(diff(diff((lowess(percentages)$y))))

This solution is what I've been using so far. The only difference is that I am smoothing the 1st derivative, since its the one I want to be smooth, smoothing the percentages curve does not produce good results.

Jose Lozano mailing list PLEASE do read the posting guide and provide commented, minimal, self-contained, reproducible code. Received on Fri 18 Jun 2010 - 06:51:04 GMT

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